That is in Hook 3.4 Public BETA 2 (4596; Integration v. 191) – Hook : From Terminal do
defaults write com.cogsciapps.hook hook.window.position.ignore.key-focus 1
to be able to manually control on which display Hook is presented, regardless of what window has the focus.
this post on the forum: Hook Version 3.4 Public Beta now available: Improved search and more - #8 by LucB