Hello Mohbbat MUjawar !

AS per you aked 'Kannada Medium' refers for those studens who has completed their schooling via Kannada Medium Schooling process, means who  have Kannad language as their third language in school studies. 

And "Kannad Region" refer for those students who belong to Kannada Locality area like Kannada native state.

Hope your query get resolved .

Feel free to ask further.