I'm not on K-Com, Carol, but I know that Kae has just gone to bed so won't be able to answer your question until tomorrow. For the sake of anyone who's reading and worrying that their vote might get discarded just because they share a house or communal computer facilities with another FoLC, I think there's nothing to worry about.
As far as I recall from the general answer K-Com gave the last time we had an incident of ballot-stuffing, suspicions get raised by a combination of circumstances, including but not limited to IP addresses. They didn't want to state what these circumstances are, quite reasonably, because that might actually present a cheat with ways to circumvent detection.
I also remember Erin saying that where there's doubt, as opposed to pretty clear-cut evidence, K-Com will contact the voter to clarify the circumstances.
I'm sure someone from K-Com will give an official answer in due course, but I hope this will reassure you in the meantime.
Wendy
