yes you can, but you need to use aux routing.
you will need to give a name to your router-outlet:
<router-outlet name="auxPathName"></router-outlet>
and setup your route config:
@RouteConfig([
{path:"https://stackoverflow.com/", name: 'RetularPath', component: OneComponent, useAsDefault: true},
{aux:'/auxRoute', name: 'AuxPath', component: SecondComponent}
])
Check out this example, and also this video.
Update for RC.5
Aux routes has changed a bit:
in your router outlet use a name:
<router-outlet name="aux">
In your router config:
{path: '/auxRouter', component: secondComponentComponent, outlet: 'aux'}