Hi Suruchi,
this is more question of SAP Controlling (SAP CO) than purely SAP Treasury.
if for some accounts you need assignment to SAP CO objects and there is agreed Costs center per Company code and Account assignment reference (it could be a combination of Product type, Transaction type and other elements, depending on derivation rules) you can use the following setup: TRM -> Transaction Manager -> General settings -> Accounting -> Link to Other Accounting Components -> Allocate Additional Account Assignments to Account Assignment References.
hope it helps.
Kind regards,
Renatas