--mark match/subsetting question

["Aaron Smith" <snafflefu@hotmail.com>]

I've got a whole bunch of redirect rules in the PREROUTING table, but for 
some
connections (say from one IP for examlpe) I want none of these redirects to 
take effect.
I need to toggle this effect on and off easily. Inserting/Removing one rule 
is ideal, but
I can't insert and remove all rules.
(Connections that exist when its toggled are unimportant)

I first way I thought to do this is with every REDIRECT rule use a --source 
! <ipfoo>,
but then I have to delete all rules and reinsert (without the --source) to 
toggle.

Then I figured I'd put a mark rule out front to mark connections I don't 
want redirected, and
every redirect rule would have a --mark ! 0x01, but the not operator doesnt 
seem to work with mark.
(Is there a default mark? - If so that would work).

It seems this is a fairly simple thing to do, and I'm positive I can do it 
given the current tools,
but I can't see how.
Any ideas?

Thanks!

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