sure, that’s quite a task to get the 2 integrated. The thing is that the CF7 plugin was initially written when WP core provided very little hooks for admin integration and as a result CF7 extensions require non-WP-std code to get to add functionality on top of CF7.
I requested and offered to help the CF7 author to re-write the plugin a couple of years back with no success. My wife happens to come from the same town as him and when visiting my in-laws I requested to visit him as his office with no success. Hence, the only way to achieve this plugin was to re-write the dashbaord interface. If you look carefully at the form table page it is using the WP edit.php file, and when you edit a form it now uses the WP post.php file. The rest of the CF7 plugin is unaffected.
This has a huge impact in enabling other plugins to play nice with CF7, especially plugins which are initially not designed with CF7 in mind (eg WPML, Polyang plugins which rely on WP std to provide multilingual post management). In order to ensure that existing CF7 extensions work with this plugin I have maintained the hooks provided in the CF7 plugin dashboard pages, but the philosophy is quite different, so I am not surprised things don’t work out-of-the-box.
So to integrate the Conditional plugin, I would need to dive in the code to see where changes can be made to CF7 Smart Grid and possibly follow up on @jules-colle offer adapt his code. I will get in touch with him and see if we can collaborate on this project.