Just being connected to KaZaA gives away your IP address. The netstat command is part of Windows. It tells who you're connected to. There's no masking. Why do you think so many KaZaA users are seemingly "hacked"? Someone started downloading from them, got their IP via netstat, and, well, you take it from there. No p2p is completely safe - unless somehow they mask their IP or something.
[offtopic]Fickle, would you get on Y! or AIM? Please?[/offtopic]