you can't change your pc's ip.. it'll only work on the internet.
You could submit all your member's ip's to the clans with a the "accept" x.x.x.x. (member's ip's) command.
then all members ip's can be added to the blacklist, only those who are on accept won't be blacklisted.
besides this I don't actually see the point.. are you talking about main blacklist (nz) or personal servers?