Advanced Filtering in Views (two level filtering)

Advanced Filtering in Views (two level filtering)

Hi, grateful for any suggestions here

My issue, I have an Auto filters for Regions/Products/period/countries etc etc  (all work well)

Then i want to further filter this list for to only show a particular sales person in that region (over 500)

Am i missing something ? in list view, this seems impossible to do at the moment

Will I be spending all weekend writing custom filters ? which for all the variations will be many


Thanks