Users, Contacts and Whitelist Policies

I am trying to add policies that will whiltelist certain Users for access to the machines on the Policy.

When I want to add a person to the Whitelist I can add Contacts, my entire Company or manually add the contact by email or company name.

It seems I need to manually create a Contact entry for all my Users or add them by email address.  I was hoping that I could select them from a list like I can when I Share a Group.

Am I missing something here?  Is there an easier way to add known users to a Whitelist or automatically create Contacts from my User list?