dear lakshmireddy,
If your purpose of maintaining a separate book for managment reporting then Controlling itself will do all your internal managment requirements. For this you need not maintain parallel ledgers.
In controlling you can restrict some entries posted at FI area by not creating corresponding cost element.
But in case of IFRS accounting you have maintain a separate ledger for parallel postings.
Hope I understood your problem correctly. best regards N.Selvakumar.
