Purpose

This condition is used for showing a transition only to those users NOT in a field. This condition supports any User or Multi-User field or custom field.

Also text fields can be used. In these cases it's expected that fields contain the name of a user or a comma separated list of user names. Don't confuse user name with users's full name.

Example: Prevent last user that commented the issue from seeing a transition

Once configured, condition will look like this: