I had found a link that showed a way seperate out the users on an asterisk box, so that for example my extensions will not end up making calls on my flatmates italk account and vice versa. That was on the laptop which is not turning on at the moment, and I cant find it again. I think it was refering to partitioning asterisk, but looking for that just gets me loads of installation issues that people are having with disk partitions. We will need totally seperate inward call processing on them and outgoings only going to the appropriate sip account.
Any pointers on a howto that should do it?