Multi fund Balancing

Hello,

I would like to know how to handle mutli fund balancing in GL.

 

Let's say there is only one bank account and one default fund attached to
the bank account. - one fund 123

Source of receipts may be several like lets say A, B,C - each of these
receipt sources have different revenue funds associated with them.

 

Currently any receipt from source A or Bor C gets posted as a debit to the
default bank fund 123 and the credit is posted to the revenue account.

How can we have the debit entry posted to the specific fund associated with