To be honest, I'm not even sure if this is possible. But, if it's not, I'd like to request it as an enhancement for future releases.
What we'd like to be able to do is have visitors/guest toastmasters, etc. not show up in the upcoming meeting attendance lists, because, as Malcolm hinted in an answer to another of my questions, it can get really long and unwieldy. But, we'd like to have the ones who *did* show up at a past meeting be listed on the page for that meeting, so that our actual attendance shows up as it really was. Is this possible? If so, how do I do it?