LWC is the longest-lived single block protection plugin that protects both the block itself and contents of Chests, Furnaces, and Dispensers. It can also protect any other blocks, and by default will also protect Doors (Wooden + Iron), Signs and Trap Doors. http://dev.bukkit.org/server-mods/lwc/
lwc.protect - Allows the player to create and manage their own protections. It also allows them to use enabled modes and flags.
lwc.mod - Allows the player to open any chest, but not remove them.
lwc.admin - Gives the player absolute power to LWC - this node should be considered dangerous if used incorrectly as this node essentially gives you the right to destroy every protection (and even the block & inventory contents associated with it) in one command!
lwc.deny - Prevents players with this node from interacting with anything LWC can protect. For example, from opening or destroying protected and unprotected chests, furnaces, etc if protectable.
http://dev.bukkit.org/media/files/577/364/LWC.jar (1.2.4 R1.0)