Associate Transactions with Particular Campus

Currently, we manage our accounting across multiple campuses using different account codes for each campus. We'd like to move away from that, but in order to do that successfully, we would need to be able to separately identify for which campus each financial transaction is associated with. That leads to our change request. Could there be a method by which we might identify the associated campus with each transaction? Particularly, the end goal would be that when we make an api request to get transactions, each transaction would have a campus_id field associated with it that we could then access.