Setting up the ability to subscribe to a single category

I have bee trying to create the ability that allows my site visitors to register for a single category so that we can run several blogs on the same site.

I already know that your "subscribe module" does not allow the selection of a single category- You need to fix that please - My research shows that there are MANY requests for this - We all need to be able to do the same thing - provide a link or a module for registering to a particular category.
I have also read your standard reply, which does not help. You do not need to send it to me. My configuration already allows category registration. I simply need a work flow for how to allow users to do that.

My question is - There is someone on the forum called Nik Farris, who seems to be able to solve this.
Is Nik Farris a StackIdeas support person or a private individual.

I want to contact him and hire him for supporting our system setup.

Can you put him in touch with me?
theo.mayer@worldwar1centennial.org

Thank you
Theo