Plan View grouped by Owner question

I'm trying to create a Plan View of Gantt charts that's grouped by the Owner. I'm able to do this successfully but when viewing in Tree format some of the child tasks to a Story are not owned by the Owner of the Story that it's grouped under.

Is it possible to have a Tree view, grouped by Owner, that only shows the subtasks owned by that Owner?

If there was a Task under that Story owned by someone else it would appear under that person's Owner grouping and the Story listed "grayed out" because they aren't the owner.

Hope this makes sense :)