NyxStudios/TShock — pull request #726 by Simon311 (2013-11-26 15:21:17+00:00)
Title: Don't let a player /grow stuff in regions he does not own.

It could also be a good idea to not let him build in other cases, like if antibuild is on, or if he is in spawn protection range, but I'm probably too stupid to find how to check all that in one line.