Organizations form the basis of the vCommander multi-tenant model. An organization is a group of consumers with a common business purpose. Organizations allow you to:

• Ensure that consumer groups can access only the resources assigned to them
• Set up distinct cloud automation configurations for your consumer groups
• Delegate administrative tasks to consumers, allowing you to lighten the load on the vCommander administrator

http://www.embotics.com/documentation/index.html?organizations.htm

If not using organizations, you can also add local users, and you can add users and groups from your directory service. (vCommander integrates with both LDAP and Active Directory)
http://www.embotics.com/documentation/index.html?add_vcomm_user_accounts.htm