Bukkit

On my server, I allow staff members to create plots via a plugin which allows to restrict the use of it to predefined areas. These regions should be buyable via RegionForSale, so the staff must also be able to create signs for this regions.

This is currently only possible if they get the regionforsale.admin permission node, what also allows them to use, among others, //rg define. This undermines the restrictions archieved by the other plugin mentioned above.

I'd suggest adding a regionforsale.signadmin node as a child node of regionforsale.admin, that only allows to create and destroy RegionForSale signs.

Can you please link the plugin you are talking about? This seems to correlate with 45 - Mayors | regionforsale.admin permission for sub-regions.