Okay, I still don't understand. I am actually moving
the controllers onscreen with my mouse in Reason
while having Logic in record. It's not recording my
movements in Logic.
Remember the fundamental way Rewire works. You send the Rewire slave (Reason) midi info from Logic and Reason sends back audio. By controlling filters directly with a mouse in Reason, you are changing the audio that is being sent to Logic, not the midi info. When you do this you kinda bypassing Logic all together. If you want to automate parameters in Reason, you can use the "Track Automate" in Logic. It will give you a list (and names) of all the parameters that you can automate. Select which one you want to automate, then draw in the automation in Logic's arrange window.
So an explicit example:
I made a Rewire track and have a Malstrom in Reason. In the "track Automation" mode in Logic, I now have "Midi Control 0-63" and "Midi Control 127" In the submenu it has a list of all the parameters names. Now draw in the value of the parameter. When you play back the track, you will see Reason responding to the automation that you've drawn in.
An alternative method is to use a midi controller and assign a CC to a particular parameter in Reason. Now it will record the notes and CC in Logic.
hope this helps.
Dual 1.8Ghz G5 PB G4 1Ghz LP7.1.1 Motu 896 Mac OS X (10.4.5) Reaktor 5.1 Reason 3.0.4 Live 5.0.2 Battery 2.1.1 Recycle 2.1 DFH 1.5.3