We do OAuth, OIDC, and idp routing based on domain or id. We track ips and have the ability (in the Enterprise tier) to add IP ACLs, but I am not sure what you mean by IP authentication.
I am not sure what you mean by wayfless, not familiar with that term.
Feel free to reach out to me for more info if you'd like to chat, my contact info is in my profile.
You can download and run the community version in a variety of formats. For testing you could spin up an ec2 instance if you'd like.
Download it here: https://fusionauth.io/download
If you want us to manage it, you can sign up for a basic cloud here: https://fusionauth.io/pricing
Let me know if you have questions.
Somewhat similar to using Azure or Okta B2B integration, but with support for things that don't support native SAML and older legacy platforms that we just can't kill.