I want to show you my first mod. It's name GDT_Protect and it runs under Forge 10.13.2.1230 (It seems to work with 10.13.2.1291 too).
It was created for Mincraft server’s administration. Only one vanilla’s command is necessary for this mod gamemode. Blocks behavior depends on the game mode (survival for a player or creative for an administrator).
GDT Protect allows defining protected areas. Only players with the appropriate rights or server’s administrators can modify the blocks in the area. To use more easily the protected areas you can make a land register.
Now it is a dev version. The areas are protected of player and explosion (Piston work for the moment).
The area's administration will come in future versions (Add better user management).
More blocks are planed (Guilds administration, Bank…)