Posting to Vendor (Recon A/C) only in Non-Leading Ledger

Dear Colleagues,

We are in the phase of uploading balances for company code and defined 2 ledgers (leading and non-leading ledger).

Customer has given different amounts in ledgers per vendor/customer related accounts (recon a/c and open item managed). However, SAP does not allow to post ledger specific document to vendor/customer accounts. Customer insists that local ledger (non-leading) should be different than IAS ledger as per national legislation.

Do you know best solution to encounter the following problem?

Regards,

Nurlan Karimli