Is CI able to handle a multi-user blog?

[eluser]Unknown[/eluser]
Hello,
I've looked at the authentication_lite plugin. It seems to do a good job at managing user levels but not individual users. If I wanted to create a site that allowed multiple users to submit blog entries, is CI capable of restricting users to editing/deleting only the entries they've created?

I've been using WordPress (built on PHP) for some time now but have found that I will need to seriously alter it for a future project. I was hoping that I could use something like CI to build from scratch rather than modifying WP. What do you think?