I've added a Tasks web part to the homepage of a Sharepoint 2010 site and I want it to show "My Tasks" for some groups (e.g. the employees), "All Tasks" for others (e.g. the managers), and would like it to not be visible at all for other groups. How can I accomplish this? So far I've managed to get the web part to appear on the front page, but I've not had much success getting it to show different things based on which group the current user is in.
Note: I am brand new to SharePoint administration, step-by-step instructions are best.