I think that it will be possible... however, I personally do not know too much about the protocol used by scratch connections. It may be easier to use winscratch in an emulator, rather than the native linux version.
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Midnight: I have a Ubuntu and can get Mesh running on it, I haven't tried connecting to a different computer with it yet ( I really should though. >.> ) but I believe you can, I've got Python to connect from this Ubuntu to the Window's computer, two computers away from this one, and it worked. But that's Python, but you should be able to connect to a different OS.
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