Using this vqmod, the customer country will shown beside the customer name. The country generated based on the customer address.

Install Instructions:
- This module run on vqmod, make sure you have installed vqmod on your opencart system.
- download this module
- upload the admin_show_country_customer_list.xml to vqmod/xml directory
- make sure folder image/flags is in your server.

for more advanced use (with filter): check this extension