Yes I looked his IP up on the forum logs- no one here would has access to that (but probably should?).  If all I had was his IP, hash and name them I wouldn't have much to go on since he changed both his hash and IP.  Would be the same location but that's not good enough to be confident about someone aliasing.

When I had the cheat protection on the server I could use the computer name and I wrote a file to the drive with a unique ID.  That's how I was able to find aliases for Turbo-Rape and Mobusta when they changed their IP and hash- even when they tried to use a proxy.  But all methods I've used to figure out aliases aren't solid- all IDs can be changed or faked so we're just hoping for someone to make mistakes.