HubSpot: Can I filter a goal on X object by Y object fields?

Unfortunately no, you can't filter goals by fields that are built on a different object. This means you won’t be able to apply relational filters across objects when working with goals inside of HockeyStack.

To work around this limitation, you’ll need to adjust your filtering logic to rely on fields available directly within the goal object. Explore alternative filtering methods to surface the correct data without using cross-object relationships.