Suppose I have a few machines, all connected to a monitor and all running linux. I want to be able do the following: Start an application on computer A and then move its window to computer B if necessary. Once the application window was moved it B should be able to use it like any other window (Similar to ssh-forwarding). Now A and B should be able to put the window back to A.
xpra, but I don't think this is what I need. It lets me open remote windows, but AFAIK I can't move my windows between computers.
Is there any tool out there that can do what I want? The world of X-programs is big, so there should be something.