I would like to send out a weekly update request for all "not done" tasks in a sheet, to all the users in the "assigned to" field. I can see how to easily do this with a workflow, but its sending all the "not done" tasks to the users. I want it to send only the task update requests for the tasks that that user is the assigned to owner. Is there a way to do this in a single workflow, or do I need to setup a separate workflow for each assigned to user?