Hi @James.S.15 ,
Thank you for reaching out to the Brightspace Community!
We have an article on how to set up a TA role that is restricted to their section. Please note, if you are not seeing the options for how to do so, it may require your institution's IT Team to help with that. If you are having trouble connecting with them, please feel welcome to reach out to us and we can assist you in connecting with them!