Allow work requests to be assigned to workspace lines

I have company level initiatives at the highest level of my hierarchy and need to be able to request the owners of a workspace line (below the company line) to create an initiative in their workspace line.

With work requests, I'm only able to assign work requests to workspaces, not lines. To make this work now, I have to assign to a random workspace but then comment that the initiative should belong to its parent line. This then requires manual linking or moving of the newly created initiative.