No, it's tricky because they both try to eat the same thing when offered, obviously not realizing that all food is going to the same place. Sometimes only one side of a 2-headed snake will eat, but they specifically said in the article that these are in competition.
It might not be possible, but personally I'd try to divide their "view" when feeding, with a piece of cardboard between the heads, but the snake is probably too mobile for that (?) so feeding both at the same time might be what they're doing? -I've never had the experience of feeding a 2-headed snake.
Sadly because of the deformity, this one can only eat very small prey items too- they didn't say how long this snake is- I wonder?