How to programmatically print node from a specific author
With the  Views module I think you can add a filter on the user name.
I don't know if you are aware of this module, but for short you have to create a view with some settings like :


Row Style : Node (or fields but then you have to add some fields)
Filters : User-> Name (or ID)


To finish you have to add a display, for example "Page" and then edit the path. With this you can create a menu with the View Page. 

See the documentation for more.

If it's not a good answer, can you explain more your problem ? (D6 or D7, how do you want to display the nodes...)

(Hope my english is not too bad)