vendor payment with multiple payment references

How do you allocate multiple payment references per line item for a specific a vendor EG a Municipality in a specific region.

Currently we are issuing cheques because we cannot allocate multiple payment references if we create an EFT payment. EG: We create a cheque payment for every factory's utility account because we have more than one factory in a municipality region and each factory has to pay it's own property levies. But that maybe come a problem as of mid July 2012 any cheque issued in SA the value may not be greater than R500 000.00 and most of the utility accounts for our factories far exceeds R500 000.

Therefore we a looking at how to address this problem payment program in SAP.