Yes and no.
Currently cell_pvp isn't something that exists, so you would need to make a custom cell and edit multiple src files to make it work.
However, this can be simulated by either making the non-pvp cells unwalkable, meaning you can't go there. Or you could use @killable command with multiple NPC's. If a player walks near/on/over those npc's you just make it so they use @killable. This will either make them a targetable person, or make them unkillable to players.
But since, this isn't done via a src edit, and through script, it is likely exploitable and can cause issues. Best bet is to ask for a modification in src or plugin section.