Hello,
I am not sure if I understand quesition correct.
1. Internal order per ledger - this link might give you some information.
FB50L FI-posting to an internal order
You can report internal orders per cost element (acutal and plan)
2. GL balances per ledger: use F.08 and select ledger, then you have report per ledger
Let me know if this is what you have expected.
all the best Erwin