I do use Linux, and I'm usually glad about it, but I wasted an hour last night trying to figure out how to change my microphone port to a subwoofer port, and never did solve the problem. Linux is awesome, but sometimes basic stuff is ridiculously difficult or impossible.
Probably not. Unless it's bi directional combined port.
But remapping audio ports like that seems like an extremely niche case I find support for it very rare in any case.