Allow setting of default value(s) for a Person Control in a Task Form, or allow the dynamic setting of Person Control values by Form Rule.

Allow setting of default value(s) for a Person Control in a Task Form, or allow the dynamic setting of Person Control values by Form Rule. This would be useful in cases where the Task performer needs to adjust an existing list of people. Unfortunately the old trick of using a Form Rule doesn't work here because the Value of the Person control is not available to set. Nintex Support (Case #00430175) confirms that this functionality does not yet exist and there is no current workaround.