I think you misunderstood me (which is perfectly normal, it's not very clear :-) )
I'm not facing an issue, i'm just trying to implement something.
I would like to check in a business rule (before user account creation) the role operator is member of, to allow or cancel the operation.
For instance, in the user creation form, i select "FR Office Paris" in the Office attribute. When i submit the form, i want to check if the operator is member of the role "FR Paris Administrator" and if not, i cancel the operation.
Quite simple on the paper.