Bex report var req

Hi All,

I have a requirement to get person responsible and user to be filled to the exit vairable

For example

If user A has under him B C D

ABCD has to be selected for data display... later user should be allowed to do filter on these 4 users

How to achieve this , using bex variables i find myself it suited to range and single input... how to get set of variables.

i dono want to use autho as it lot of maintaice ... this has to happen dynamic.

Rgds

Savy