Limit access to Terraform by IP Whitelist

I would like to limit access for our company’s Terraform Cloud environment to the external IP addresses of our VPN. That is to say that I want to block access to our Terraform accounts and/or workspaces from everything except our corporate VPNs.
We currently do this with other providers, such as Bitbucket Cloud and Splunk Cloud. Is this possible with Terraform Cloud?
I have found plenty of documentation on whitelisting the Terraform IPs, so that the traffic can be limited from Terraform to our environment.

AFAIK, no. For a canonical answer, you might be better off asking HashiCorp Support directly ( rather than this public discussion forum.