In role-based applications, role labels are displayed above the Instances header - one for each role assigned to your user:
In this case only the role ACME Employee is assigned to David Stringer.
In addition, the role labels also have a filtering function. Click a role label to display only the instances associated with that role in the instance list.
After David has sent his idea, his instance list is empty. Sending the idea has triggered the second process step for which David's role ACME Employee has no access rights.