Position->workcenter assignment maintained in PO01, not displayed in PPOSE

Hi,

Though I have created and maintained the relationship of a workcenter with a position id (A003) in PO01, I donot see the relationship in PPOSE.

Gurus,

Here is the question. I am not sure whether above is feasible or not. If no, please let me know whether a group of users can be assigned to a position in the organizational structure. Also, let me know, how to create a group?

Thanks in advance for your response