Welcome to the community! I tried the code you wrote, but it did not work nor for me, so I modified it:
<$list filter="[tag[Project]tags[]]"/> It collects all the tiddlers that have the "Project" tag and then collects their other tags. If I understand you, you are actually interested in the tag intersections, thus you might find it useful: https://bimlas.gitlab.io/#Filter%20by%20multiple%20tags%20easily%3A%20FilteredTag%20example -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/e5558f8e-ec92-4b9f-bd4f-73057b6bb912%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
