handling several purchasing groups in LIV-process

[Korman, Peter]

Hello workflowers,
 
I've following problem:
 
1. An invoice gets blocked in LIV-Process. The invoice has multiple =
positions related to different purchase orders.
 
2. A function module should identify all purchasing groups, which are =
set at the material master contained in different invoice positions.
   (A programmer would write this function module for me.)
 
3. The workitems should be send to the identified purchasings groups =
(users)  for check and release. (Release of the invoice document not =
until all users made their decisions)
 
My questions: Is it possible to handle multiple purchasing groups in one =
workflow?
                 If yes, how should I pass the p.g. to the activities? And what =
should the p.g.-export parameter look like (table or different =
parameters?).=20
 
I'm not very familiar with the possibilities in this case.
Your help is highly apreciated!
 
Greets,
Peter Korman