I just got the game yesterday (gamersgate), and I think that I have an answer to my own question. Since there is no online log-in in vs. 1.0.22, I'm assuming that an offline lan can be made possible. I don't have another computer here at college to test this out with, but once I'm home in about two weeks, I'll install it on another of my computers and see if the LAN mode works offline. Also I'll post if there are any changes to this in v. 1.11.3.0 which I'm downloading now.
On another unrelated note, GODDAMN this game has a lot of controls/options that you can do! I played around for 15 minutes yesterday and got utterly destroyed in the first mission on easy as I fumbled around with the controls. What a noob