@Arachnophoric all pokies are, to an extent. Folio stripe fading in females, higher contrast in coloration and pattern. Males tend to look more "scruffy" around their markings, for lack of a better word and, as Venom1080 said, more drab.
Regalis, vittata, fasciata, hanuma, smithi, and ornata. All of these can be dorsal sexed. The abdominal band has nothing to do with it. Females have it just as dark. It fades in old females. Juvie females and males both have a very dark stripe.
You'd be hard pressed to prove the others are dimorphic and I seriously doubt you could.
@Venom1080 That's interesting to hear, I was under the impression that outside of ornata, dorsal sexing was pretty unreliable until the male matures. I'll have to look through some photo galleries, I guess.
@Venom1080 found your vitatta picture, definitely can see what you mean lol. Some day it'd be nice if we could compile a thread of sexually dimorphic species. I know one exists for ornata at least, though iirc half the images were broken in that thread.