you can say "may it be for our country too" but it sound's weird the word "may" is overly polite in everyday speech. If you give an example of why you would say "may it be for our country too" I can let you know what to say instead.

So first, see your situation and find the correct answer.

As per your above sentence, May it will be for our country too- it is indicating that the same work will be done for your country and you are 100% sure. But When we use may be, it indicates that we are not sure but hope that it can do for the country.