New Google+ updates help filter results in 3 ways:
Filter by content type on tabbed interface. From the search results page, you can filter by 5 items: All, Publications, Communities, Collections and People and Pages.
Filter from Messages: categorize results by location as well as origin (from users themselves, from people watching, from people).
Limit search results and display content only from the user's domain. This way can remove the contents of the external page. Google Plus is also developing the ability to switch between user content and public content in search suggestions, search results and on the Home page.
To register for the Google Plus Beta program, you access this address.https://plus.google.com/+googleplus/posts/jGApEys8CAN