Hello.
I use Icecast2 with multiple chennel.
it is possible that, i use multiple autodj?

i want ,
- retro 80s channel < retro 80s autodj
- retro 90s channel < retro 90s autodj

how i can?

The autodj can only broadcast the same content on all mount points, if they belong to the same station. So it's not possible to configure it in a way that it uses different media/playlists for different mount points. You need multiple stations for that.