I have two installs of Wordpress, one a standalone

Hello I have two installs of Wordpress, one a standalone (mastersite) and one install as multisite.

Both sites use membership plugin and I under that user sync will not work with website to website within my multisite setup.

However, my question is this, would User sync work to sync one of my websites in the multisite setup to the master site (which is completely standalone)? so that the users for that particular website in my multisite setup can access my mastersite too?