PNC
In your Group Footer section, put a control that indicates the group. For example, let's assume that the Detail section of the report has a field called [Status] and the status can be either "Open" or "Closed." Then, in the Group Footer section, you would put a text box control which has =[Status] as its control source. (Hide it if you don't want it to show)
Set the Group Footer section to go to a new page after the section.
In your report's Page Header, put a text box control which has ="Page Header for Group " & [Status] as its control source.
Tom