Retrieving Airtable records by specifying user’s email

You can accomplish this by not using VirtualFields and instead adding something like this to your functions.php (or a plugin):

add_action( 'the_post', 'add_some_airtable_data' );

function add_some_airtable_data( $post ){

	// you can target a specific custom post type
	if ( get_post_type() == "post" ){ 

		// you can target a specific post slug/name
		if ( $post->post_name == "hello-world"){ 

			// you can target a specific category
			if ( has_category("uncategorized") ){ 

				// Setup AirpressQuery with Table Name and Config ID/Name
				$query = new AirpressQuery("Furniture", 0);

				// You can statically provide a filter
				$query->addFilter(sprintf("{Name} = '%s'", "Byam Rug"));

				// Or you can get a custom meta value from the post
				//$values = get_post_custom_values( 'My Custom Field' );
				//$query->addFilter(sprintf("{Name} = '%s'", $values[0]));
				
				// the property 'AirpressCollection' is what all Airpress shortcodes
				$post->AirpressCollection = new AirpressCollection($query);

			}

		}

	}

}