How to segregate invoice payments from different LRUs that are in the same BU

Summary:

Scenario: We have configured 1 LE that is associated with 2 LRUs (LRU A and LRU B). Each LRU pays for its own transactions.

LRU A uses the ACCT123 paying bank account.

LRU B uses the ACCT987 paying bank account.

These 2 LRUs (A and B) are associated with only 1 BU XYZ.

Payments are decentralized by LRU.

Example:

Several invoices are entered into BU XYZ, with 20 invoices belonging to LRU A and 35 invoices belonging to LRU B.

When the payment batch (PPR) is created, I need to pay the 20 invoices from LRU A separately from the 35 invoices from LRU B.

How can I create a batch already directed to the ACCT123 disbursement bank account and select only the invoices from LRU A, without the notes from LRU B being selected together (check installments), since all invoices are in the same BU XYZ?