How to make correct View for tasks for each user?
You can solve above problem using Views Field View module..

Project page says


  This module allows you to embed a view as a field in a view. A new
  field handler is made available, so this can also be used in area
  (header/footer/empty) handlers as well as rows.



Create a new view which accepts term id as argument and lists nodes related to that term
Add Contextual Filter Author ID - Provide default value
In your view add term id and select Exclude option
In your view add above view as a field and read term id using token in settings.




See the result below