Whenever Jack and XsX release Junk Jack X and adds more people able to join servers, they should allow plug-ins for factions and PvP. We could play cool games with each other and it would be really awesome
Anyways, it should be possible if servers are run through a server application on a computer, which I'm sure they will be. At least large dedicated servers will be run on pc's.
If you have any questions or comments I will be glad to help! :)
Maybe some servers are servers pixbits have that will be 24/7 so I think this should be after release but maybe if they add command blocks for junk jack x with wiring maybe you can make adventure maps