[xwiki-users] Multiple Userrights per Page

Hi All, I have a bit of newby question which affects userrights. I have a page with content, which different usergroups will look at. I want that Usergroup A only sees the top bit of the page, and Usergroup B to see the whole page (top and bottom). Can I do this over Rightsmanagement? So that Group A will only see some Content of the Page, and Group B will see the total Content. One of the reasons why I want this, is that I do not want that Group A sees that there is more content which they cannot access. I was thinking of using the include makro here, but it would be far easier to have just one single document and use Rightsmanagent to determine who sees what on the page. I hope I expressed my question clearly, any help would be appreciated. Thanks in advance, Wouter