Might I recommend you create a separate tag each context, instead of a field. A tag itself can be a tiddler with its own tag.
So you could create Home, Work, and Out tiddlers, each with a Task tag. Then your filter would look like: [tag[Task]!is[tag]tags[]tag[Task]unique[]] -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/3edae740-7615-45f8-b531-7843f83e3009%40googlegroups.com.
