Sounder = slimmouse?

I have a sneaking suspicion that Sounder and slimmouse are the same person.
I've been going round and round with slim in the Dear Israel Lobby, We Give Up thread, trying to get him to provide hard evidence linking the Rothschilds to the Israeli lobby (blood from a stone), and suddenly Sounder, who I've never had a problem with, is bizarrely attacking me in a completely different thread.
In addition, I've been looking at their posting histories and I'm noticing that they make quite the tag-team in the global warming thread.
Are there any tools available to us to check their IPs and whatnot?
I've been going round and round with slim in the Dear Israel Lobby, We Give Up thread, trying to get him to provide hard evidence linking the Rothschilds to the Israeli lobby (blood from a stone), and suddenly Sounder, who I've never had a problem with, is bizarrely attacking me in a completely different thread.
In addition, I've been looking at their posting histories and I'm noticing that they make quite the tag-team in the global warming thread.
Are there any tools available to us to check their IPs and whatnot?