Focus based on file duration (or maybe other things)

Title says it all . . . I don’t see this, but I have missed Focus criteria before, so I just wanted to ask.

If duration is not possible, how about arbitrary named ID3 tags (in filetypes that support ID3 tags)?

Thanks.

Heh . . . The fact that this post got moved from “Support” to “Feature Suggestions” implies that neither of the features I asked about currently exist. Please vote!!