How to chose the Actor of a Task in a previous Task?

Hello, I am using Bonita BPM Community 6.2.1 version.

I wonder how I can set the Actor of a Task by chosing it in a previous Task.

In my process, I have a step modelled by a human Task named "Assignment" where the Actor is chosing in a list the Assignee (the Actor) of the next Task "Job".

 

 

If you can capture the username of the selected user in the Assignment task, then you can use the single user actor filter to assign the Job task to specific user.

Chris