How can I control the list of portlets a user sees when they customize a Page?
A user only sees the portlets for which they are authorized. For example, only Portal Administrators see portlets like “Users”, “Services”, and “Providers”. You can also change the structure of the Portlet Repository, which is implemented as a Page Group, to control what users see and how they navigate through the list of available portlets. You can organize portlets into subpages, and each subpage can have its own access control settings. You can also define access control settings on individual portlets in the Portlet Repository.