Can I use Siri on Mac to trigger stuff on IFTTT?
I was wondering if anyone knows a way I could use Siri on my Mac along
  with IFTTT


Assuming you are referencing "Mac" to mean a Mac computer and not a mobile device such as an iPhone, iPad, or iPod, then no, you cannot use IFTT via Siri on your Mac.

From the App Store link of the IFTT website:


  This app is only available on the App Store for iOS devices.


However, if you're using it on iOS there is support for Siri.  See this Knowledge Base article:  Using Siri with the Note widget service