Profile Field admin condition

[Bilderback]

Does anyone know a way to set a conditional on a profile field update?
Lets say I have a small radio button list of options:
Owner
Developer
Designer

Since there are only a couple actual owners, I wanted to add a conditional
to that option in case any staff attempted to set a user option to 'Owner'
similar to the unalterable / uneditable users.
If a users profile was attempted to update as owner, it would give an error
that this user is not an Owner.
This can be based on UID or usergroup- doesnt matter.

I just didnt know where to begin.
Am I in the right place looking to set a plugin hooked to userdata_presave
and adding a dual conditional to check a UID array if the 'Owner' field is selected.

Thanks for any help