So, I'm using WorldGuard, and I gave Owner into a certain person in a region. But everyone can open the chests in that region, and I just want to the owner Open, what should I do? I tried a lot of flags, like Use, Interact and Chest-access, but I can't! PLEASE HELP!!
Use '/region flag <region> chest-access -g nonmembers deny' on the region. That will only allow members and owners of the region to access chests. Check with '/region info <region>' which flags you have set and remove any that you do not need.