Filtering a slicer (no relationship_

Thanks Jihwan_Kim 

That would be an acceptable solution if I am trying to find salespeople with sales, the slicer should show users filtered by location.

I found the solution in another post and I have updated the PBIX - Filtering a slicer example 

DAX used

Location Filters Users =
IF (
    MAX ( 'Salespeople'[Location] )
        IN VALUES ( 'Sales Location'[SalesLocation] ),
    1,
    0
)