Pardon my ignorance but what would be the point of that? You can sign up on any instance and participate in any women's communities. It's not like there's any way to verify the user's gender anyway.
Local feed is one of the best parts of Lemmy conceptually and a very clear indicator that the intended behaviour for users is to sign up to smaller insurances related to their location or otherwise significant individual interests.
It would only work if I don't subscribe to any other instances. That's a bad tradeoff.
The fediverse needs a tool to surf other instances local feed cause that's a common issue for both the threadiverse and twittoverse. Soon, we may have enough theme-oriented PixelFed instances for them to have the same issue. I believe PieFed multicommunity feeds to be the best way to tackle it so far but that's not even a good solution.