I tagged some notes and clippings "Sermon on the Mount" and did a search mytag:"Sermon on the Mount". The search results came up with the right notes and clipping files containing these tagged items. However when I opened one of the files it simply opened to the top note/clipping. I was expecting it to only show me the contents with the selected tag. Worse, it opened to the top of the file so I had to search for the appropriately tagged items.
Giving the benefit of the doubt, I'm going to assume that Logos will do a better job of this soon, but just in case I thought I'd mention that tagging doesn't do much good if you can't use the tags to assemble and print or export only items of interest.