Thanks for your reply.
I think you misunderstood my question. Definitely the allocation will be done at the time of chart preparation in both the cases. My question was is there any provision in IRCTC website where we can request for 2-person coupe, like we make request by writing "CP" in the reservation form.
Anyway, I found the answer myself and the answer is yes.
While...
more... booking the ticket in IRCTC website, we need to select the Coupe in the Berth Option (click on drop down arrow & you will see "Coupe"). While preparing chart we can request the DRM or relevant person to give preference. The procedure is same as mentioned in the other blogposts.
Regards