2 users 1 network router

[savedbygrace]

Can 2 computers connect to the internet through the same router and play online multiplayer as seperate users on the same server when 2 seperate copies are used?

[Gruntage]

I believe it is possible with some games (I've seen it done), but not possible in others. I haven't tried doing it with any of the BIS games so I'm not sure if they fit into the 'yes' category or the 'no' category.

[h-]

I believe it is possible, at least I have had a laptop and this desctop PC side by side running the same MP test mission through the same router (desktop PC was also running the server).

The again I don't understand the MP side of things at all so it might not have been a real dedi server situation..

[j0e]

From the point of the net protocols, yes, they can. 
Each client connects through the NAT with an unique link to the server, but of course will be seen with the same source-IP, that is the router's one.
It's the typical situation of a LAN with access to the internet.

Anyway, as Gruntage wrote, a (generic) game could decide to disallow multiple connections from the same IP.

Speaking about OFP/Arma, the 2 computers will be logged as Player/ID/GUID (that haven't relationship with IP) and so will play regularly.