Hi,
On Linux the X.org server runs on seat 7 by default and I can start a new (parallel) desktop session say on seat four: Ctrl+Alt+F4.
I wonder if the new session starts its own library instances or uses the same ones from seat seven, ... is there any documentation/policy on this?

For example, in this case is there a parallel Qt library (or Gtk or whatever libraries are installed) running on seat four?