You can select which providers are available for clients to schedule appointments with on the client portal. This can be found under your organization settings for the client portal. More information is available in the following help article:
https://theranest.zendesk.com/hc/en-us/articles/360051585232-Client-Portal-Overview
If this isn't what you were referring to, please resubmit your request with additional inforamtion about what problems you're experiencing in TheraNest and what you'd like to accomplish. Thank you!