How to integrate "Conditional Activation Group"

Hi there ;.)
I'm looking for a way to solve this:
I try to automate a process in an app (Logic Pro /OSX). At some point a automated BTT shortcut will trigger a render process which brings up a window. BTT should wait now with the following triggers until this window (which has a fixed name) disappears. How can I automate this? I understand it could be done with Conditional Activation Groups, but I cannot see how. Thx ;.)