Does anyone know in multibook how you can have the same transaction with different segmentation in different books? (same transaction, different C/D/L in different books)

nope 😞 - unless you want to record your transactions twice. If that is not an issue (i.e. you are ready to create book specific transactions for every transaction) you could make it work. however it is a huge undertaking and probably is not worth the effort in the end.