Quote by soulpoetry: How can I give "Logged-in-users" permissions to edit their own stories.
You can't, at least not in the way you want it.
To edit stories, a user needs the 'story.edit' permission. This, however, has a few side effects like giving them access to the Admin's story editor where they could also, for example, upload images.
With a careful selection of topic and story permissions and a new group it would be possible to prevent them from editing other people's posts, but that would require them to set their story permissions properly when they submit a story.
You may want to look for other solutions ...
There is, I think, a version of the static pages plugin that allows users to create pages (search for "upage"). Maybe that would be an alternative (never tried it myself, though). Or some variation of the Journal plugin.
bye, Dirk