Using 'where' => to Comparing two fields of one record against another record's two fields and if both fields of each match produce results

Can someone point me in the right direction to get this 'where' to work?

  list($our_teamRecords, $our_teamMetaData) = getRecords(array(
  'tableName'   => 'our_team',
  'where' => "first_name AND last_name = '{$property_listingsRecord['first_name']} AND {$property_listingsRecord['last_name']}'",
  'allowSearch' => false,
  ));

I need the 'where' => to apply the first_name and last_name to the records, so that if someone has the same first name OR the same last name... the 'where' => will NOT produce records for both people because the first or last names match. So it needs to be specific to the "first_name AND last_name" and only produce results based on an exact match.

For example: if John Smith has property listings and Jane Smith has property listings... only the listings associated with the individual are produced and not both John and Jane - because their last names are the same.

-OR-

if John Doe has property listings and John Smith has property listings... only the listings associated with the individual are produced and not both John Doe and John Smith - because their first names are the same.

I hope that makes sense.

Thanks for any help you can provide.

Zick