Main command is /lock. Aliases contains /lockit, /lockette and /lockettepro.

Command & Permission List:

Edit a sign
/lock <line number> <player>

Reload configuration
/lock reload
Permission: lockettepro.reload

Admin break lock permission
Permission: lockettepro.admin.break

Admin use block (snoop chests)
Permission: lockettepro.admin.use

Admin override placing interference blocks
Permission: lockettepro.admin.interfere

Admin edit any sign
Permission: lockettepro.admin.edit

Towny permission to protect chest in wilderness
Permission: lockettepro.towny.wilds

Lock a block for other people
Permission: lockettepro.lockothers
If a player does not have this permission, he can only make himself the owner in order to prevent accidently wrong name is entered on sign.

No lock expire for specific player
Permission: lockettepro.noexpire
The lock expire feature will not work for this player. Thus, his lock will not expire.

Special Permission

A permission plugin that supports "reverse permission" is required. Most permission plugin has this :)

Disallow players to lock chests
"Reverse Permission": -lockettepro.lock

Disallow players to edit their lock signs
"Reverse permission": -lockettepro.edit