Configure Apache to accept any host requests

My website is running on Apache, and i m using Symfony version 3.0.9 framework. it is a click tracking application.

Now, my website's users will have to assign a costume. (point a CNAME record to my website).

click.User01Domain.com >> CANEM >> myWebsite.com
track.User02Domain.net >> CANEM >> myWebsite.com
trk.User03Domain.org >> CANEM >> myWebsite.com
...

I m wondering how to make Apache/Symfony accept any host requests?