well, we're in a LAN and as mentioned above - I get kicked from a server as soon as my gf joins the server; or the other way around, depending on who joins first. I hoped this would be fixed by now, but it's not. What can we do except waiting for Battlefield 3?

you need another CD key for that....

You're trying to play from same SN? On the same server? No worry, maybe it meant to do that way that it doing with identical SN.

Running two sessions off of one key wont kick the first player, it'll deny the second one. Running two C2 gaming sessions off of one shared internet connection on a LAN is a problem though....

There's no LAN in Crysis 2 though...

Router NAT issue...

Well we've got 2 keys (obviously). We are simply in a LAN toghether and try to join an online server. But when we do the second person that joins gets kicked. Simple as that - coming to the NAT issue. How could we fix that? Any suggestions or known fixes?

You only have one external IP coming out of the router. If you had 2 internet accounts you could do that.

2 static IP's from one location (house/apt).