Change Parameter But Not Render

Is it possible to have a parameter that won't trigger render?

My plugin has a keyframer section that is meant solely for adding keyframes to the effect (see my earlier question). There are a few parameters that determine how the keyframes should be placed. I'd love it if I could intercept the change in parameter value (probably with PF_ParamFlag_SUPERVISE) and then tell AE not to send a SMART RENDER request.

Thanks, Christian