How to split/allocate distributions on a PO matched invoice when matching/entering the invoice

Summary

How to split/allocate distributions on a PO matched invoice when matching/entering the invoice

Content

We have a business need to split/allocate distributions on a PO matched invoice, how can this be achieved ?

For example, say we have a PO with a vendor for services to be rendered for the next 2 years and we receive an invoice from the vendor on a monthly basis, we would like the invoice to be matched to the PO and the coder(the one entering the accounting) to be able to split/allocate the distributions across different departments etc.

How can this achieved, any insights are much appreciated.