No, you may use the same profile/email address for all roles and for different Organizations.
If you are a member of multiple Organizations, you may toggle between Organizations using the drop down prompt on the Review My eLearning dashboard.
If you are invited to join another Organization within Review My eLearning, you will receive an email with an invitation link. Be sure to support@reviewmyelearning.com and noreply@reviewmyelearning.com to your contacts list within your email to prevent these invitations from going to spam