Then it get’s hard again, and out of MaxiGallery scope. You need to do a system where frontend users can create new documents with specific template that has a MaxiGallery call in it. And if the galleries should be only manageable to that specific user that creates the blog/gallery, you need to have the webusers ID in the MaxiGallery call.
Here’s one example of creating that. But that’s pretty old post and it would be better to do it with
FDM snippet now. FDM snippet does have a lot of bugs in it, so you’d need to dig up that thread if you encounter something.
It’s not an easy task to set this up, but if you spend some time with it, you learn much about MODx and will get it done.
EDIT: Btw, the tutorial in the wiki doesn’t create the galleries so that they could be managed only by the person who created it. They can be managed by everyone on that specified webgroup. You would have to implement it so that the webuser username / id is saved on a TV when the document is created and then that TV is used in MaxiGallery call in the document template for &manager_webusers parameter.