You can assign users into different user groups, so you can give different groups of users different cloud experiences. At present you can assign a UI theme to specific user groups (Settings > Look&Feel menu).

vCloud Director Organizations

In vCloud Director, an organization is a unit of administration for a collection of users, groups, and computing resources. Users authenticate at the organization level, supplying credentials established by an organization administrator when the user was created or imported.  vCloud Director organizations are imported into OnApp as user groups. You can view the list and details of user groups, if  you are a user with one of the following roles: