The only way you can do that is configure SABR (source ani based routing). With that you can tell which user’s can use which trunk. This is an advanced configuration that is only configurable via the CLI.
We teach this in the Expert 7100 class called ATSE/UCAS
Here is config guide: https://supportforums.adtran.com/docs/DOC-1862
Let me know if you have any questions.