In the process template definition, when a task is assigned to a group with the Any option, it is available to, and can be performed by any member of the group. These tasks are displayed in the task list as Available tasks.
You can assign the task to yourself. Alternatively, a group member (usually the Manager or Lead) with access to the Management module, can assign the task to you.
For more information on making tasks available to a group of valid users, refer to the OpenEdge Getting Started: Developing BPM Applications with Developer Studio.