Ability to specify workflow process definition using swimlane.
Swimlanes are used to track parallel work streams within a common resource. The most typical use might be grouping composite work items with a parent. Another typical use is an expedited lane for emergency work items that can skip queues and preempt other work. Swimlanes generally indicate some kind of branching. That can be either work item branching or workflow branching.
Kaleo web and workflow designer should be able to define swimlane.