You can use the Human Task APIs to look for the tasks that are currently assigned to the Role asociated with the Human Task 2. Did you check the docs inside the jbpm.org site? Here is a simple example that shows how to interact with human tasks in jbpm5.
https://github.com/esteban-aliverti/JBPM-Samples/tree/master/Simple-Human-Task-Sample
Cheers