Hi Patrica,
Sorry for replay so late. Unfortunately, there is no support for business task. At this moment, jbpm4 only support some types of task.
- 3.8.11. Task: User Task
- 3.8.12. Task: Java Service Task
- 3.8.13. Task: Script Task
- 3.8.14. Task: Manual task
- 3.8.15. Task: Java Receive task
- You could refer the Developer Guide.
- And I am very sorry for cannot find how to download oryz editor for BPMN2.