If you want advanced notifications that use regular expressions or whatever kind of rules you can dream up, you can always write a slack bot that listens to cha

If you want advanced notifications that use regular expressions or whatever kind of rules you can dream up, you can always write a slack bot that listens to channels you are in and pings you directly whenever a rule matches. Any average software dev should be able to write a bot that does that, with less than a couple of hours worth of work. There are all sorts of existing bots that are open source and that can be easily modified and deployed. Slack's API is phenomenal.