If you build the process something like this, the email I point to will only be triggered once. As each user task is completed, that branch will wait at the merging inclusive gateway until all active tasks are finished, then it will move on to the email. 

Rereading your first post, are you talking about the email notifying you that your user was assigned a task? Or the Approved email after? I am trying to get just one copy of the Approved email once each assigned user finishes their task. 

Thank you, how do I go if I need one email to be sent if the the users approved the task and another one if they rejected it?