I was just trying to understand what you wanted and why.
Assuming I’m understanding you correctly: you would like to restrict some users to only making transactions with customers and other users to only make transactions with suppliers. You also would like a different sequence number for these two groups. Doing so would enhance your business management efficiency.
Note this is not the same as a separation based on receipts and payments as the other party is different for refunds. Also payment and receipts can apply to neither a customer or supplier, they can be with an owner or financing company (when taking out or repaying a loan).
I have no objection to such a request. I probably didn’t understand what you wanted as I would have no use for the facility. On the other hand I would find being able to link these transactions to a customer or supplier very useful, so wanted to know how it would integrate with that.
I think those tabs were separate in an older version of Manger