Best method to search for a customer using CRM - Creator integration

Best method to search for a customer using CRM - Creator integration

Hi,

I'm working on an app that makes use of the Creator/CRM integration. Since you can only access one field at a time using the Integration field type, I'm trying to find the best way to do a customer search. For example, if I choose Last Name as the Integration field, then you could have a dozen customers with the same last name and no way to see which is the one you are looking for. 
Any advice?

Thanks,
David