This feature request was opened upon a Customer's desired use case with Workflow:
Allow assigning multiple specific, predefined users to the same task, while avoiding to involve roles for this act. Currently only one specific user is allowed to be assigned per task (by screen name, user ID for example).
The demanded use case would be the following in production:
Let's say a 100 users are assigned to the same role, but while assigning a specific task, the Customer would like to assign it to just a couple of users (e.g. 3) - favorably randomly - from that batch of 100 users.
They do not want to assign the same task for all the 100 users at the same time.