There isnt going to be anyone around to comment until Monday or so, but the answers I got so far is that each PLAYER needs his own CD key and that it doesnt affect solo-play.
Dom2 is in its 3rd printing. Im majorly sure that little machine its contacting isnt trying to keep a database matching keys to ip addresses (sheesh, I alone would max that out). All it seems to be doing is instead of checking an internal list of cracked CD keys, it now checks a centralized list. So if you are playing with a downloaded cd key you are out of luck.
BUT the HOST does check IP/Key together (it always has). So players connecting to a host get checked to see if the same key is used on multiple machines. It used to just declare you a cheater (no, turning cheating off in the menu doesnt affect that).
I dont think it keeps track over multiple turn-ins of the files. I think it only compares players in that turn when it hosts. If you were able to play the same game before by doing different turns from different machines, then you probably still can. Now that I think about it though, I can see a problem if you played mutliple nations and used multiple computers. It would be too easy to forget that you finished Ctis from home and turned in the final move on Jotun from work. I think I would always make sure to reload and turn in both nations.
I have a 5 machine network in the house with multiple copies off one CD. This machine alone has 4 full copies off one CD (plus 3 partials, and 2 demo Versions). We have 3 players in the house and one other we are trying to convert. Im surprised my key still works.
