Yeah, that's pretty simple. I'm not sure how to do that with WordPress but you could do that in Drupal several ways. Probably the easiest by using the built in Blog module which gives each user the capability to write their own blog. By default if you set Blog content to post to the front page (does this by default) both author's content will show up in a list.
To take that a step further you could use the Views module to create a block of content for each author and then place those blocks in separate regions.
That's just the description in broad strokes but it sort of covers the basics of how it works... There is probably something similar in WordPress too.