I have a task list and within the task list I have the tasks assigned to individuals. In many instances my task is assigned to more than one person.
I have a “Bar Chart” which lists each assigned person and how many tasks they have (broken down by task status). If the user is the first one listed in the Assigned To field that tasks gets counted for that user… but if a user is not listed first, then that task is not counted for them. See the attached screen shot for the example: