DF manages the BLR lounge, not 080 AFAIK. Its fairly easy to get into the BLR lounges what with the number of cards allowing some level of lounge access.
Went to the international lounge, they said NO ACCESS to cards and redirected to the BLR lounge. No priority pass even!
There's a phone number that no one picks up, the domestic lounge number, the person picked up and said only first class, business class and priority pass is accepted in...
If there's a reasonable match they should show you. Actually I believe they don't care, as long as the card works. I have taken friends, family etc with my cards, and nobody has checked, though I've always been present. Not tried solo with a different card though.