Right now the anal fingering tag includes both when a male is fingered and a female is fingered, but these are two different things when it comes to taste.
I do see that we do not have any other gendered tags for sexual acts, but this seems to be one of the few clear situations where two different tastes share one tag. Also, even though it's not explicit in the name, pegging is essentially a gendered anal tag.
My proposal would be an anal_fingering_male and an anal_fingering_female tag with the long term goal of deprecating the anal fingering tag. What do you guys think?