Lets be honest here, most on this site want to show some work on the web to get that pat on the back just like most of the web-world of photography, regardless of method used to arrive at said image. So this area of the forum is pretty dead because there are very few professional fine art shooters on here, most are hobby types who need to somehow digitize their film images in order to share...they are hardly worried about "Presentation & Marketing".
I definitely use the notion of a full analog workflow in promoting my fine art, but man.... the lifeblood of the image has got to carry it *all* the way there. In every case that a viewer of my work loves an image, the question of how I arrived at it in terms of tech story and life story always comes up...always. So I never really have to beat anyone over the head to tell them that it is 100% analog, no computers, etc...
But yeah, don't expect much activity in this section and really, the idea of finding film-only venues is kind of self defeating, you need imagery that will have people tripping over cracks in the sidewalk before that will ever matter...
Blow someone's mind with the impact of your image and then you get to enjoy the extra "Ooomphf" of telling them it is the real deal, no digital anything.