Ppf investment

Yes, since under section - 80C , eligible assessee are only individual and HUF. 

Here the word is only individual that means both resident and non resident covered.

Dear Prakash, an NRI is not eligible for investing in PPF in India.  Hence he cannot make any investments.  If he was an Resident at the time of opening the PPF A/c & subsequantly he becomes an NRI, then he cannot renew the PPF account at teh expiry after he becomes an NRI.