Is it possible to run a network server for Counter Strike and play it using the same Steam account on two computers? I know you can't do it online, but does Steam stop you doing it if you're playing on a LAN server?
Well if you unplug your ethernet or disconnect from wireless. Steam will automatically (or maybe ask) if it should log in as off line mode. Or there may be an option to go ofline. But you have to have your password saved and have logged in online before.
To play lan, im not quite sure but I would imagine youd need to have no connection outside your LAN...but im really not sure.