While technically possible to code, such a command is inefficient. Incooperating /f perm and /f access together is way more efficient. Leaders and officers can override owner-permissions by default, so if you don't want the normal members to be able to build everywhere, you can deny it within /f perm and specify their plot access with /f access. Besides that, make use of the newly added recuit rank (only available on github or in the next published versions). It will help you to organise your claiming alot.