So, I run a PVE server and one of my players built a town for everyone to utilise with a heap of rooms, doors and vending machines. Problem is as it's a PVE server, I run the plugins :

True PVE
Prevent Looting
Clans Reborn (Paid)
Dynamic CupShare (Paid)

and players can't use an item someone else has placed. I have gone around and shared all the doors/vending machines/boxes for everyone to use BUT I can't keep doing that every wipe. 

How would I go about making the town so that anyone can use anything there, but restricting it for the rest of the map?

I am pretty sure that's how it works, even if you use CopyPaste.  Every month I paste the town and then /share each item.  I am pretty sure it's PreventLooting that blocks access, but I don't think that checks ZoneManager there.  It could be modified to do so.  You might try adding ZoneManager, create a zone at /town, and set the flag NoBoxLoot to disabled.  I don't know that it would intercept what PreventLooting does.

Alrighty, at least I have somewhere to start. Thanks man.