0mgsparkle https://plutonium.pw/docs/custom-games/#connecting-via-an-ip-address
"If the friends list doesn't work for you, you can try connecting via an IP Address.
Have the host get their IP (which they can do via the Plutonium Overlay's Network tab, or via WhatIsMyIP)
Then, you will simply be able to connect by opening the console and running the command
connect HostsIPAddressHere
"