There are a couple ways to handle this.
First of all you could just use the wiki page assigned to your profile to create (among anything else you want to put on there) an index to all your articles. You would have to manually add links to each of your articles but this is probably the cleanest way to do things.
Then just put a link to your profile page in your sig and 'bam', users have easy access to your articles.
Or, for instance, I put links to my army profiles (the ones I have) embedded into the little army icons I have in my sig (that's another way you can do it).
Beyond that it IS possible to create a 'category' called 'Waaagh_Gonads' which you could then apply to each of your articles which would then automatically put a link to them on that 'Waaagh_Gonads' category page but it really isn't efficient for us to start giving each user their own category page.
I did allow it for PaniC, since he seems to be pumping out a pretty high number of terrain and modeling articles that he wants to keep related to each other:
http://www.dakkadakka.com/wiki/en/Category
aniCs_Terrain_Tutorials
He's added a bunch of big box-style links with pictures in them, but if you scroll all the way to the bottom you can see the automatic list of articles that have that category that the system automatically generates on that page.
Finally, you could always just create a 'Waaagh_Gonads article index page' that is just a regular wiki page that you (kind of like PaniC is doing on his category page) manually add links (and/or pics/text) to all your articles.