You can specify the users to whom a task may be delegated.
Prerequisite
The function is of the Human task type.
A human task must be connected to both a dialog and an organizational unit (Role, Internal person).
Procedure
Create a data flow for an object of the Human task type.
Connect the field Group of allowed delegates with the relevant list of users or user groups. The Create collection operator is used in the example.
You have restricted the group of users this task may be delegated to.
Example