I have an index like this:

\starttext

\index{butterflies}

\index{horses}

\index{cows}

\placeindex

\stoptext

The placeindex will place every index.

Is there a way to say, display an index, but only for a specific single entry, or specific list of entries, e.g.

\placeindex[horses, cows] (would exclude butterflies from the index entries)

--Joel