It would be helpful to be able to filter by comparing 2 objects in the data model

Being able to filter a widget or dashboard based upon 2 objects returned from the model would allow for targeted results by allowing end consumers, when creating an N:N or 1:N result to return 1:1 results. This would allow for dynamic filtering of results. For example. I may want only those applicants living within the same city as one of my existing office buildings. 

This could be done by adding another filter option, result object from model. Then the user could select the object. This will enable dynamic filtering based on result sets rather than strictly selected value filtering.