When I went there earlier this month, I was surprised by the number of people who were swiping Infinia and Magnus.
Also at the number of people ignorantly swiping PP (the staff where not revealing about the charges on PP for domestic lounges)..
I believe I was the only one from that line, who used a Rupay card.
So yes - Every Rupay Card (DC and CC) are eligible, if lounge eligibility criteria is met.