How do I search in a group?

[Fommo]

Hi

I have a data view of a issue list. My client want me to show only the lines containing a comment, that is not only the latest (that is default behaviour in an issue list).
The problem with this is that it doesn't show the latest status of the issue if the latest post doesn't contain any comment. :-(
My idea to solve this is to group all postings containing a certain issue and put the latest status of the issue in the group header.
I have managed to put the status of the first posting in the group, but as I stated above this is not enough.

So how do I get the latest status of the issue in a group of postings?