List of sites to access via proxy

[KleoPadre]

Is your feature request related to a problem? Please describe.
It is possible to add sites to access indirectly, but I would like to add sites that would be accessed through a proxy, and the rest directly

Describe the solution you'd like
Setup similar to the existing one with adding domains for proxy access

Describe alternatives you've considered
Tried to set something like this up via custom rules, but it didn't work. For example, I tried this:

function FindProxyForURL( url, host ) {
    // Default to using no proxy.
    var ProxyConfig = "DIRECT";

    if( dnsDomainIs( host, "lostfilm.tv" ) ) {
        // Requested domain matches, let's use the proxy.
        ProxyConfig = "SOCKS5 127.0.0.1:1087";
    }

    return ProxyConfig;
}

But in Auto Mode by PAC, all domains still go through the proxy

Additional context
It is inconvenient to have all sites open through proxies, it is much more convenient to decide by yourself which domains will open through proxies, since there are few such sites, and exclude others quite a lot