Yes, to know to which customer family each of your customers is assigned you have to follow the following steps; Go to Settings > Import/Export > Export to file.
Settings > Import/Export > Export to file.
In Type of information select Customers, Excel format, and finally you have to move from available attributes to selected attributes the required information, in this case choose Reference, Legal name and Customer family.
Click on Export, it will download an Excel file with all the information.
In the Excel you can filter by family as you need.