Thank you for your post.
We would first like to clarify that ONLY the WordPress Menu Addin licenses are domain based. Such a license is necessary ONLY for WordPress sites on which you want to deploy your menus in.
Read more on the WordPress Menu licensing at:
http://www.likno.com/addins/wordpress-menu.html
The AllWebMenus license is not domain based, but rather 'per seat' based which means per machine you install the program in. You can use your menus in as many websites.
Now, having said that, we would like to answer your question:
The Server-Side-like behavior of the “WordPress Menu Addin/Plugin” is basically due to the Plugin’s dynamic functionality; it thus uses the same licensing philosophy as the Server-Side Menus API which adapts menus to a specific domain using these technologies.
For necessary information about licensing please visit: http://www.likno.com/addins/wordpress-menu-purchase.html
As we understand the user might need multiple domain licenses, we offer discounts on multiple license purchases.
For multiple domains pricing please visit:
http://www.likno.com/addins/awmssmregister.php