Thanks, that would be awesome.
In my Project, I made 2 games, one for the server and one for the client. The host is doing the whole work, the client is only sending requests and the host sends results back. I made this to prevent cheating. The Relay server just communicating with the host and all players.
EDIT: I already made this with the official multiplayer plugin, but i don't want to rely on a signaling server.