they tested it on parsec though, although I have no idea about them using controllers for each computer, maybe try setting the keyboard to controller 1 and remap it from there if one of you don't have controllers (the same controls as the default, keyboard bindings in the screenshots. parsec's supposed to emulate a second controller for the one who's connecting to you, like streaming a game, I'll try on my end and see if it works. If both of you have a controller that is not an XBOX 360, use x360ce for that instead, set your controller to controller 1. (p. s. I don't have the solution for Parsec yet, I was only referring to sharing one computer local.)