It would require to send yourself the email.
Suppose that you can use the mail function of PHP, you could do something like that:
$content_of_the_email = ob_get_contents();
switch($data->cart->billing_address->address_city){
case 'City 1':
mail( 'nobody-0@noplace.com','Subject of the email',$content_of_the_email);
break;
case 'City 2':
mail( 'nobody-1@noplace.com','Subject of the email',$content_of_the_email);
break;
case 'City 3':
mail( 'nobody-2@noplace.com','Subject of the email',$content_of_the_email);
break;
default:
mail( 'nobody-3@noplace.com','Subject of the email',$content_of_the_email);
break;
}
If you can't use the mail function, you'll have to send them with joomla mail functions.