You may want to look into
http://forums.bukkit.org/threads/sec...556-1185.4336/
Lockette is a little bit like SimpleChestLock yet has a lot more features which makes sharing chests a lot easier. You can use lockette to have only certain users access chests, furnaces, dispensers, and doors. Lockette can also be used with the Permissions plug-in to have certain groups such as Admins only able to open a certain door or chest.
By default all OPS on the server can override locks.