With the release of WP Job Manager Field Editor 1.2.4 comes a new feature for WooCommerce Paid Listings.  You can now configure fields that you only want to show on specific packages, or even on multiple packages.  A new tab has been added in the modal called Packages and with a little bit of configuration you can get your site up and running with completely different forms based on what package the user selects!

Find more information on the documentation page for Show/Hide specific fields based on selected package