If you guys are running three separate simultaneous servers, you probably would be allowed to have a separate thread for each server.
I say this with a giant boulder of salt because I'm not a mod and I can't make that decision, but I've seen postal issue a ban reason that amounted to, "make only ONE thread for each of your servers, not three each" so I would ask him if you don't want to risk a tempban to find out the hard way.
but the implication is that the server was moving from point to point
aka it only needs one thread!!