The task is assigned to a single user, group, or role. For example, a vacation approval request is assigned to a manager. If the manager approves or rejects the request, the employee is notified of the decision. If the task is assigned to a group, then once one of the managers acts on it, the task is completed. If the list of participants is built using an approval group, then the task is assigned to the group; however, once one of them acts on the task, it's considered complete.
Configure the task metadata with the list builder pattern—name and expression. Let the participants be users (Christine, jstein, or jcooper). Upon execution, the task gets assigned to all three participants—Christine, jstein, and jcooper. However, once one of them acts on the task, it's considered complete.