[whpalmer4]

Yes, I think you could do that. The simplest form might be to have a project per client (or a folder of projects per client). You could put together a perspective that shows completed work grouped by project and sorted by completion date within the groups to get your history view, and a perspective that shows the next action for each project as your status overview. To see these on a per-client basis, you would just select the client's project(s) in the sidebar once you had opened the perspective.