The pop-up window with the list of Parallels Infrastructure Manager users displays when you click the Select link in the Container Owner group on the Request Container screen. After the request is processed, the user chosen from this list will enjoy the ownership of the Container being requested within the limits of the permissions set for him. If the user you suggest to be the owner of the Container is not to found in this list, it has to be created: expand the Security Manager group of links under System Director on the left Infrastructure Manager menu, click the Users and Groups link and press the New User button in the Action section.
To identify the user there are the Name, Email and Description columns. To select the user, click its name and close the window; the name of the user will appear in the Container Owner field on the Request Container screen.