Hi, i often play on Arma3 wasteland on high fps server. Very good server, by the way.
Recently i have trouble with a player because of very bad behavior
(Tk for steal money, car and weapon)
It really upset me. So i note hs name, is there any place to report it ? or is there anything i can do to make it not happen again with tis guy ?

For such a situation, you should contact the owner of the server if you can find them on GT, or any information about them on GT, or at their website. You'll need to do your own research on that.