How to restrict only one supplier user to create or inactivate other new contacts in supplier portal

Summary: How to restrict only one supplier user to create or inactivate other new contacts from the supplier portal

Content (please ensure you mask any confidential information):

We have a requirement where the client wants to restrict only one supplier user from each of its suppliers to have the ability to create contacts and assign roles. The rest of the supplier users who have the ability to login into the supplier portal should be restricted access for contacts creation or updation.

Version (include the version you are using, if applicable):

24

Code Snippet (add any code snippets that support your topic, if applicable):