diff --git a/QgisModelBaker/gui/topping_wizard/models_page.py b/QgisModelBaker/gui/topping_wizard/models_page.py
index 29433bff8..ec1383a19 100644
--- a/QgisModelBaker/gui/topping_wizard/models_page.py
+++ b/QgisModelBaker/gui/topping_wizard/models_page.py
@@ -70,18 +70,21 @@ def validatePage(self) -> bool:
         return super().validatePage()
 
     def _refresh(self):
-        self._load_available_models()
+        self._load_available_models_and_sources()
         self.models_model.check_entries(self.topping_wizard.topping.models)
 
-    def _load_available_models(self):
+    def _load_available_models_and_sources(self):
         """
         Collects all the available sources in the project and makes the models_model to refresh accordingly.
         """
         checked_identificators = []
         db_connectors = []
+        sources = set()
+
         for layer in QgsProject.instance().mapLayers().values():
             if layer.type() == QgsMapLayer.VectorLayer:
                 source_provider = layer.dataProvider()
+                self._append_possible_sources(sources, source_provider)
                 schema_identificator = (
                     db_utils.get_schema_identificator_from_sourceprovider(
                         source_provider
@@ -101,3 +104,32 @@ def _load_available_models(self):
                         if db_connector:
                             db_connectors.append(db_connector)
         self.models_model.refresh_model(db_connectors)
+
+        self._refresh_source_combobox(sources)
+
+    def _append_possible_sources(self, sources, provider):
+        if provider.name() == "postgres":
+            sources.add("pg")
+        elif provider.name() == "mssql":
+            sources.add("mssql")
+        elif provider.name() == "ogr" and provider.storageType() == "GPKG":
+            sources.add("gpkg")
+
+    def _refresh_source_combobox(self, sources):
+        display_map = {"pg": "PostGIS", "gpkg": "GeoPackage", "mssql": "MSSQL"}
+
+        self.source_combobox.clear()
+        for source in list(sources):
+            self.source_combobox.addItem(display_map[source], source)
+
+        none_text = self.tr("No source defined (allow all)")
+
+        self.source_combobox.addItem(none_text, None)
+
+        if len(sources) == 1:
+            # it's clear which one we take
+            self.source_combobox.setCurrentText(display_map[list(sources)[0]])
+        else:
+            # no sources or it's not clear which one
+            self.source_combobox.setCurrentText(none_text)
+        self.source_combobox.setEnabled(bool(sources))
diff --git a/QgisModelBaker/gui/topping_wizard/topping_wizard.py b/QgisModelBaker/gui/topping_wizard/topping_wizard.py
index 2cc5fabf3..cfe3a0532 100644
--- a/QgisModelBaker/gui/topping_wizard/topping_wizard.py
+++ b/QgisModelBaker/gui/topping_wizard/topping_wizard.py
@@ -101,7 +101,7 @@ def _current_page_title(self, id):
         if id == ToppingWizardPageIds.Target:
             return self.tr("Target Folder Selection")
         elif id == ToppingWizardPageIds.Models:
-            return self.tr("Model Selection")
+            return self.tr("Model and Source Selection")
         elif id == ToppingWizardPageIds.Layers:
             return self.tr("Layer Configuration")
         elif id == ToppingWizardPageIds.Additives:
diff --git a/QgisModelBaker/ui/topping_wizard/models.ui b/QgisModelBaker/ui/topping_wizard/models.ui
index 50c2263ba..a225dc242 100644
--- a/QgisModelBaker/ui/topping_wizard/models.ui
+++ b/QgisModelBaker/ui/topping_wizard/models.ui
@@ -14,6 +14,19 @@
    <string>Select Files</string>
   </property>
   <layout class="QGridLayout" name="gridLayout">
+   <item row="4" column="0">
+    <spacer name="horizontalSpacer">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>693</width>
+       <height>20</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
    <item row="0" column="0" colspan="2">
     <widget class="QLabel" name="description">
      <property name="minimumSize">
@@ -28,6 +41,9 @@
        <bold>true</bold>
       </font>
      </property>
+     <property name="toolTip">
+      <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;&lt;span style=&quot; font-weight:600;&quot;&gt;Select the type for which this topping should be made or specify none (allow all). This value will be written into  the categories and the toppings will be filtered accordingly.&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+     </property>
      <property name="text">
       <string>Select the Models of Interest. These are the models on what you will find the metaconfiguration / topping at UsabILIty Hub.</string>
      </property>
@@ -39,6 +55,13 @@
      </property>
     </widget>
    </item>
+   <item row="4" column="1">
+    <widget class="QPushButton" name="refresh_button">
+     <property name="text">
+      <string>Refresh</string>
+     </property>
+    </widget>
+   </item>
    <item row="1" column="0" colspan="2">
     <widget class="SpaceCheckListView" name="items_view" native="true">
      <property name="sizePolicy">
@@ -49,23 +72,35 @@
      </property>
     </widget>
    </item>
+   <item row="3" column="0" colspan="2">
+    <widget class="QComboBox" name="source_combobox">
+     <item>
+      <property name="text">
+       <string>Allow all sources</string>
+      </property>
+     </item>
+     <item>
+      <property name="text">
+       <string>PostGIS</string>
+      </property>
+     </item>
+     <item>
+      <property name="text">
+       <string>GeoPackage</string>
+      </property>
+     </item>
+    </widget>
+   </item>
    <item row="2" column="0">
-    <spacer name="horizontalSpacer">
-     <property name="orientation">
-      <enum>Qt::Horizontal</enum>
-     </property>
-     <property name="sizeHint" stdset="0">
-      <size>
-       <width>693</width>
-       <height>20</height>
-      </size>
+    <widget class="QLabel" name="source_description">
+     <property name="toolTip">
+      <string/>
      </property>
-    </spacer>
-   </item>
-   <item row="2" column="1">
-    <widget class="QPushButton" name="refresh_button">
      <property name="text">
-      <string>Refresh</string>
+      <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Select the type for which this topping should be made or specify none (allow all).&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+     </property>
+     <property name="wordWrap">
+      <bool>true</bool>
      </property>
     </widget>
    </item>