Cheri
Sorry for the LONG delay in getting back to this..
While your suggestion would work (though I have not tried it) there is a fundamental problem. It puts the group selection process in the hands of the survey respondent. Their interpretation of the question being asked determines the pool they are placed in.
Simply put - there will always be a situation where the groups are defined by some arbitrary constraint that isn’t apparent to the respondent.
Besides, As the survey creator it should be my decision in all cases as to who is part of what survey group.
Example - I have 3 different customer bases - New, Stale, Active, the classification of each is very subjective. - could be determined by how long they have been customers, or how much they have ordered in the past year, or the number of orders per month. So why confuse the respondent with having to try to classify themselves. It makes no sense to me.
Bryan