It is usually an option in the wireless users section.
You should find things in there like access control that limit machines by mac address(what I was referring to), ip address (not sensible unless fixed) time (definitely look at this), and target address(ie restricted sites)
You should find things in there like access control that limit machines by mac address(what I was referring to), ip address (not sensible unless fixed) time (definitely look at this), and target address(ie restricted sites)