Hello,

you can use custom fields of type list, radio, checkbox or SQL as filters for your data in the frontend (then add the filters in the 'pagination' tab of the menu item).

You cannot use the standard fields (like Country) as filters, but you can make the fields searchable so that when searching for a country, the users get the contacts from that country. It just won't be a select box (in the 'page display' settings, select the search box).

To make a field 'searchable', just select that option when adding the information to the card (each field has the 'searchable' option, when creating menu items - not in modules).