I believe ISBoxer does this, But I'm not 100% on the across computers part.

as for just moving the mouse to other PC windows (MultiPC) Mouse without borders via Microsoft, Input Director, Possibly synergy. I think Stardock software has one also.

It is possible to do some of this via macro, using setscreen and then tying it to say Earthquake for example. I'll have to look it up again, in game, as I rarely use them anymore.

Stephen