Exclude Participants
Excluding participants lets you control who can work on tasks such as approving the tasks.
You can control the users that can approve a task by excluding any user from acting on a task. For example, you can ensure that requestors cannot approve their own requests, and prevent unauthorized users from acting on a task. If you want to exclude multiple users, you can specify an expression. You can enter comma separated usernames and user IDs in the expression.
To exclude participants: