Select cells if adjacent cell meets condition

Hi All,

I've a set of tasks assigned to some users. And I have few drop down boxes. When I select a user from a drop down, the tasks associated to that user should display under the user.

I searched in forums to only find the number of tasks associated with every user. But, I want to list the tasks and not sum. Any help will be greatly appreciated. Please find attachment for reference.

Thanks in advance,
Nivi