Yup, that’s the opposite of what BI Fusion does. I set up what you want though, there are a couple options out there, check out this post (and surrounding thread):
I made a virtual motion-switch for each camera in smartthings, then used a Maker channel and Smartthings IFTTT integration. So in Blue Iris, I have each camera set up to send an Alert to a different Maker channel url for motion on and motion off. Then in IFTTT I have motion on and motion off applets for each camera, and they either turn on or turn off the virtual camera device. It’s a bit round-about and cumbersome to set up, but the other smartapp options out there use oauth and a url that changes every time you go into that app’s settings, which was a nightmare. The BI Alert > Maker Trigger > IFTTT switch on/off > Smartthings virtual device for each camera has been going strong for 11 months now (thousands of triggers later…).
There are lots of alerting smartapps out there, I use Super Notifier to keep them all straight: