Ability to default supplier site based on currency selected on requisition smart form

Summary: Is there a way to add validation to my req smart form so when I enter a req and add a currency - only supplier sites with that currency defaulted on the invoicing tab would be able to be chosen by the LOV?

Content (required): if USD is chosen only suppliers with sites tied to USD would be chosen

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):