Automation of CASE Transform

Hello friends,

I have source file contains records of USA and UK countries as of now. I've loaded them into template tables (Country wise) by using CASE Transform.

if source file come up with another 3 countries records tomorrow, Is there a way I can automate the process..? instead of sending other countries records to DEFAULT table.

I mean creating template tables as per country wise using CASE or any other transform..?

Thanks & Regards

Vaishaali