Be that as it may, it seems to me that your design is wrong, but then I can only go by your post. There probably ought to be one table for parts, one for pickup people and a junction table for parts/pickup people. That is, unless one person can only pick up one part. Then 2 tables should be enough, but the decision then would be whether the person id goes with the part or the other way around. As soon as two or more people can pick up the same part, or one person can pick up more than one part, you have a design problem.
You accomplish what you want by basing the form on a query and not a table. You'd probably link on the two id fields but include the person table field with the names. I'm not trying to be nit-picky, but Access doesn't have "userforms" they are just forms and are a completely different animal.