You could ofcourse pipe it to stdout, grep the line away and pipe it back to stderr..
Heres an example:
commands --to --excute 2>&1 | cut -v "member names" 1>&2
I _think_ it should redirect stdout from the first command as normal, so it shouldnt mess up the normal flow of stdout. But, I cannot vouch for that as I havnt used the idea in a situation where stdout output was also needed.
Actually now tha I come to think of it more, that would probably indeed mess up the normal stdout output to stderr instead.. too bad