How to group bookmarks in Emacs?

I would like to group my bookmarks like buffers with ibuffer or newsgroups with gnus by certain criterias like projects for example. I also tried Bookmark+ but couldn't get anything like this working. Does anyone know a way to achive this?

Bookmark+ provides several different ways of grouping, organizing, and even combining bookmarks. ("Grouping" can mean several different things.)

Take a look at these possibilities:

• Using multiple bookmark lists (i.e., bookmark-list views);

• Using multiple bookmark files;

• Bookmarking a bookmark list itself or a bookmark file itself or a Dired buffer with its markings etc.;

• Tagging bookmarks

What problems did you run into trying to use it to group bookmarks? What did you try, for instance?