well, one use proxy server for hiding the Ip , isn't it? so you can not get it ! and if he use multiple proxies then you should forget about it completely.

That is correct Unleashed proxys are used for hiding people's IP. But there has to be a way to obtain a IP address threw a proxy server or multiple proxies.. I tryed searching www.google.com but I didn't see anything useful. Ganjica I will not fall for any social engineering tricks lol. If anyone knows how can you please post it.