Dhanush had won a National Award for the same film earlier this year.
While Dhanush was adjudged the best actor, Lara Boldorini was awarded the Best Actor (female) at the festival for her performance in the Brazilian film 'On Wheels'.
"Asuran" features Dhanush as Sivasamy, a farmer on the run with his family in a bid to protect his son who has killed an upper-caste landlord in vengeance.
Manoj Bajpayee and Dhanush shared the best actor honour for their roles in "Bhonsle" and "Asuran", respectively and Kangana selected as best actress for her performance in "Manikarnika" and "Panga"