Using two different slugs on a route

I'm upgrading an old procedural site to laravel 5.2, and I'm struggling with the old routes I made.

On this website, the routes were made like this : {user_slug}/{content_slug}.html. For the moment, I use cviebrock/eloquent-sluggable to generate the slugs, but I'm open to another one if this one cannot meet my needs.

I have two questions :

• Can I make the content-slug unique, but per user ?
• How can I write the route and the controller in order to match the correct user slug ad the correct content slug ?

via Chebli Mohamed