Hi.
You can use SQL to specify a portion of the load ID. If you get a load ID that includes an object ID of 1234FAA, then you can include it in your SQL selection criteria (along with, say, customer number) like this:
doc_name like '1234FAA%' and cust_num = 987654321
I know that sounds brief and cryptic, but it's a push in the right direction. Let us know if you have more questions.