As a manager I would like to filter by user on the Scrum Rapid Board in planning mode

I need the ability to see issues in the Backlog on a per user basis when doing the sprint planning with a Scrum Rapid Board. Having a quick filter where I can type the name of the user is a solution that would work.

The developers (users) on the project are very specialized, and most of the issues are pre-assigned outside of the sprint planning.

This will allow me to address all the issues assigned to a given developer at once, rather than jumping from developer to developer during the planning meeting.