Assigning multiple managers to a single user in Captivate Prime

Is it possible to assign multiple managers to a single user in Captivate Prime?

I have a user group, where I need 3 managers to have access to the same group of users (all 3 managers are client educators).

I'm trying to find out if I can add three (comma separated) manager ID's into the CSV upload, or if I can perform this action in the Prime UI, once the users have been uploaded.

Thanks in advance.