Allowing duplicate transaction numbers (multiple credits) for same participant

Is there a way to allow duplicate transaction numbers for the same participant? We are using credit override code CNNEC to directly import credit amounts on our transactions. The participant we are paying is an external supplier who is the employer of several different solicitors. Even though the participant we are paying is the same, we need to calculate payment for each low-level employee (solicitor) on each transaction. Each solicitor may have different earning rates, so calculations need to be done at a solicitor level. The Credited Solicitor DFF will be passed as an attribute to a rate table storing