Let say you have two company codes xxxx, and yyyy that you want to have different screen control. In P0002 feature, you can set return value for company code xxxx to have value '10', and 'yyyy' to have value '11'.
In T588M, for mod pool 'MP000200', feature 'P0002', you'll have two entries, one with varkey '10', and the other with varkey '11'. Here, you can double click each line to set up screen control separately.