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Thanks for asking.
The solution is this:
1) Create a new action (f.ex. named "Bring Logic to front") with this piece of AppleScript
tell application "Logic" to activate
2) Then add it to your Behaviour at Behaviour Factory > Actions.
3) Finally, select it at Behaviour Factory > Default Mapping > Events > On automatic activation (foreground)
4) Execute a "Compile, test and permanently install scripted Behaviour"
I've had a few people ask for a Behaviour that supports Logic. If your Behaviour is general enough, please consider sharing it. A few people would be very happy about it for sure.
Best regards,
Felix Schwarz