How to access more than one churches' CN site from the same login
Here are instructions for how you can grant someone at another church the ability to access your family directory from their current login at their church (and they can do the same for you so you can access theirs)
1. Go to the Family Directory, select Add New Family
2. Search for their family record
3. Select their name and select Move Selected Family → As Unregistered.
They must add you as a staff member in their Administration tab: CNFSv Administration - How to Add Staff & Staff Permissions (Video)