User Dependant Category

https://blog.dallasstarsforever.com

I’m looking to modify wordpress to have it default to a certain category depending on user. Like, if “chris” posts i would like it to go to category “Chris’ Blog” and so on so fourth. is there an easy way to do this? hell, is there any way to do this? i’m pretty adept with php if need be.

Any help would be greatly appreciated.