Provision user fields from LDAP the same way roles are assigned: (LDAP attribute)|(field value)

Hopefully a simple request: It'd be useful to make it so that user fields can be populated the same way that user roles are, using (LDAP attribute value)|(user field value) pairs instead of using the LDAP attribute directly.

For example, say a user has LDAP attribute "departmentID" = 713. As things are, I can map departmentID to a user field called "user_department", but then user_department = 713. What I'd like is to be able to enter a list of (LDAP attribute value)|(user field value) pairs, like "713|Safety", so that when depatmentID = 713, user_department = Safety. If no value is defined for a given LDAP attribute value, then it could default to the current behavior of (user field value) = (LDAP attribute value).

I know this is already possible for roles, I'd just like to do this with user fields too. Please let me know if it's already possible.

Thanks!