The following limitations apply in this release of WebSphere Portal:
The JSR 168 specification does not define portlets filters. The portlet filter provided as a portal service in WebSphere Portal cannot be used with JSR 168 portlet.
The setsecure() method of the PortletURL is part of the PortletURL interface, However, it is not supported by WebSphere Portal. The security level will always be same as the current request.
The isUserInRole() method of the portlet request at the time of this writing this is unsupported and will always return false. All <security-role-ref> elements in the portlet.xml are ignored.
The getUserPrincipal() method of the portlet request always returns null if application server ...