Make a list of user's calendar events from all the groups he is member of in its profile page

Hi all. This is my first time in Drupal and calendar. I have successfully setup a calendar for each organic group i have in my site according to this page http://beeznest.wordpress.com/2010/08/05/drupal-6-calendar-case%C2%A0study/ . Now i want to ask if it is possible to implement the following scenario.
UserA is member in both groupA and groupB. GroupA has an eventA and groupB has an eventB. How can i make in user's profile page a calendar which will display both eventA and eventB only from the groups UserA is a member of?