How to prevent wireless client to client communication?

Hi!
Is there any way to prevent Wireless client to wireless client communication on an Access Point??
Hardware: Rb433 + SR2.

Disable default forward on your AP.

/interface wireless print
/interface wireless set x default-forwarding=no

Where x is the interface # number of your AP. With only one wlan, x=0.

http://www.mikrotik.com/testdocs/ros/3.0/interface/wireless.php

Thank you very much!