Hello, it would be extremely useful to implement setting different configuration for notifications per application or per message matching particular regular expression. For example I don't care about notifications from some random app and want it to disappear soon. But if I get calendar notification I want the ZOMG-PONIES theme, center of the screen + sound + never disappear until I click it. It's just that not all notifications are equal. As far as I read on mac one can configure notifications per application so seems like this prooved useful for others.
This feature has been partly implemented in git master (to be the first release after 0.3.3). Currently you can mute certain applications. What I will not implement is setting all kinds of settings (including theme-changes) on a per-application basis though. I'm consequently closing this bug as fixed. If you feel it shall remain open (for when the next maintainer comes around to reconsider) please feel free to re-open!
Thank you for working on this. Appreciated! I'll have to see how new version works for me and will decide if anything more is really needed.