Yet Another World Protector is a server-side protection mod which allows you to protect your creations against various different events/actions of players, mobs and the environment. It was inspired by the forge mod WorldProtector and the WorldGuard plugin.
This feature from Quark
Allows you to place blocks in regions you should not be allowed to.
Here it is in action: https://www.youtube.com/watch?v=wtLjpx2XSHU