Hi Warhawk,
there are several ways to do that.
On the search page, you can explicitly search for tags and categories (see here for details: Searching for Stories - Help & Info - Community for Gay Kinky Stories)
You can also restrict the story list by clicking on the “Categories” button and unchecking the categories you’re not interested in.
And of course you can also sort by authorname and storyname by clicking the respective header.
Let me know if you need any further assistance!