Go
here and scroll down to Administrative Ruling 89-5. Review Example #3. Get the lawyer to confirm your understanding of the facts then: the individual goes in Section A and you check "conducted on own behalf" in section B. Add another Section A for the church and one for holder of the IOLTA (lawyer or law firm). (Including the church is a judgment call on my part.)
Just in case someone wants to engage in an academic discussion about whether Administrative Rulings are still binding: When they are the only guidance available on a specific issue they are automatically the best guidance available.
It's also worth noting that this should have been figured out before the transaction was allowed to take place. I think it odd that an attorney is cagey enough to send someone else to deposit the cash to an IOLTA...lawyers don't do that. I would make it a point to tell him the reporting would include his name or that of the firm.