[triconitroz]

If a computer (I.e) Marc 2 is able to connect to doors and lights and shit, they need to be on the network.
And I'm saying boot it off the network, kick its connection. Make it reattempt to connect. And realistically it would have to crack the WiFi password which takes time. That time would be used to take control with Marc 1, since Marc 2 is cut off from the network, and turn off Marc 2.

As far as forcing LAN connection. Eh kinda not really maybe. Sure it could connect, but if everything else is refusing its connections, it wouldn't really be a part of the network.

Ah, so that's what you mean by network. The room controlling network is a wired LAN, without Internet connection whatsoever. It can only be accessed in one port, and said port is connected solely to the PC which homes MARC II.
The WiFi, on the other hand, is used in the whole house for Internet connection. So you see, there's 2 different networks going on here. This WiFi is what will be used as an 'area' where they battle.