How do I view a flagged users activity?

Hi, thanks for the module.

All activity shows up under activity/all. But I want to show all the current users activity, and all activity of users flagged by the current user. So I add the flag access filter, but it only shows activity which has flag involved with, such as when a user user flags a content.

How can I set up a view to show all the activity of a flagged user?

Thanks for any help.