Trace and contact bitcoin thief My btc-e account was hacked (or my passwords stolen from my computer). I was able to make screenshots while they were withdrawing my bitcoins. So i have the btc wallet adress where the money went to and I have the ip adress of the thief. 
Is there really nothing I can do? Can I find and contact the owner? how?

The ip is: 21211716315

The wallet is: 15M9rP1GshzBfMbqnHL77iqVcvmgbzVa4S
Unfortunately, there is not much you can do.

By design, it is very difficult to identify a person from a Bitcoin address. In principle, if the thief eventually  transfers the coins to an exchange in order to sell them, it could be possible to trace  the coins to that point, and the exchange might know who got the money. But they would probably not divulge this without a court order (if even then), and they may be in a different country with different laws. Moreover, the thief could use a mixing service or other techniques to make it much more difficult to trace the coins to the exchange.

The IP address is a little better (yours is missing some dots, by the way). You can use a tool such as whois to find the ISP to whom the address is registered, and their records would show which of their subscribers was using it at that time. But again, you'd need a court order, and they could be in a different country. Furthermore, there's a very good chance that the thief is not actually their subscriber, but someone who compromised their subscriber's computer and used it remotely. There could even be several layers of this.

Each of these steps would need the assistance of law enforcement, so it would be reasonable to report the theft to your local or national police agency, and give them the information you've shared with us. (It could take some work to educate them about Bitcoin, or find an officer who is already familiar with it.) But unless      the thief has done a shoddy job of covering his tracks, it's unlikely he'll be caught, and even less likely that you'll be able to recover your coins.

Sorry.