That is correct, 1 computer per WoW. There is in theory a way to hook up 1 single mouse and then "multithread" mice such that one mouse could operate say, 5 mice but each mouse was confined ONLY to a specific area AND each mouse moved proportional to each other and was resynched often. But nobody that I know of has done it. I did have the mouse cage part coded for my own uses although I have never released it.