2 things:
1) If you have that information, why haven't you already handed it over?
2) I very much doubt it would be any use ... though any network savvy person would realise that

I agree that a savvy person would know better, but he may not be so savvy after all.
1) Nobody has asked for it yet. If and when they do, I will be happy to give it to them.
2) IP is not from a proxy server. It is in the US.
There are plenty of people who are lot more network savvy than I am. That's not the point. The point is
that I am willing to give over any information I have in my server in the hope it will help get this jerk busted.