Yes thats indeed the gamespy server list for Back to War.
Yes its possible to do this for the C2 server. But to make the ip adresses display of the players online is something different though. I don't think im good enough to pull that trick. Though it must be possible. If you hoover over the flags on the list on the main page, you see their location ( country and city). This however is the location of the internetprovider they are using.
You already get a lot of information out of that, cause its very unlikely that 2 players are from the same city , same country at the same time in cossacks. But , its always possible ofcourse.
So Ip adresses are more usefull indeed. I used to have a trick for this a few years ago, but I kinda forgot how to track cheaters.
I'll have a look around if someone else has an idea, and I'll check some friends at another game that are brilliant in scripting stuff against hackers/cheaters. Maybe they got a better idea.