It’s unfortunate that tags aren’t exposed in the API, which means that Altbee can’t use them to filter (or sort, for that matter.)
That said, my browser extension has a feature that’s rather similar to Altbee’s filter box, and there you can indeed filter by tags.
If one day Beeminder exposes tags to the API, I’ll be able to add filtering by tag to Altbee. Until that day, if you really want or need tag-based filtering you can try using my browser extension (with the official Beeminder site.)
The extension also allows you to “collapse” goals that you want to minimize: it pushes them to the end of the list, and collapses them to take up much less room. This allows you to put aside goals that you want to get out of the way for the moment. It’s possible that this would help more directly with hiding goals you don’t want to pay any more attention to for the day.