Trusted Solaris did. It was very complicated to use, so only organisations that really needed it were using it. The product was discontinued in the late 90's a

Trusted Solaris did. It was very complicated to use, so only organisations that really needed it were using it. The product was discontinued in the late 90's and its core features such as RBAC was included in standard Solaris in later versions. However, the more advanced stuff like tagging of connections, etc, was never included and was dropped with the demise of Trusted Solaris. I think it says a lot that I worked at Sun at the time and I actually never used it.