Hey everyone -
As Dimorphorchis is such an odd little guy by nature, I can't say definitively that the two flower forms are not individual male and female flowers, but it is my understanding that most other orchid blooms are different than any other plant flower as the male and female organs are fused together in the center column, or gynostemium, making each flower both male and female. This is consistent with other orchid flowers considered perfect, but I again have no clue about Dimorphorchis. From the flower photos the reproductive organs look identical, but I really can't see the pollinia / stigma or rostellum that well.
Good luck on finding out info - I looked and could not find that much on this one either, but you may look under one of their many synonym names.
What a beauty!
Steve