In few days the older content in OG can be buried under recent content, then a tag filter could solve this issue.

A goog option for this tag filter could be some jquery modules like:
| Comment | File | Size | Author |
|---|---|---|---|
| Screen- 2013-08-12 a las 08.47.23.png | 388.34 KB | aramollis |
Comments
Comment #1
charlie charles commentedHave you tried https://drupal.org/project/og_vocab
Comment #2
aramollis commentedMaybe could be filled under Commons 7.x-3.4 radar feature request Issue?
Comment #3
ezra-g commentedThis seems like a great feature request - Thanks! However, the radar tag is generally reserved for the Commons team to organize our release targeting and since this feature isn't scheduled for development for 3.4, I'm removing the tag.
Comment #4
aramollis commentedOk. thanks. Sorry for the wrong uses of 3.4 radar tag.
Comment #5
aramollis commentedAny update on this feature request?