Been gone for 5 years now from Port Mac. Not aware of any local brew clubs. Best local supplier from there is Brewman, so not really local, but as close as you'll get to a quality supplier.
Not aware of any local Port Mac or Wauchope brewers on this forum, but on the other (ahem) forum there were a couple of local members, although not active on there for quite some time. Try waggastew or balconybrewer.
Did have a phone message from waggastew over Easter, but that was about a 2003 Mitchell red wine I had donated to him some years ago. He is still brewing.