There are currently 54 Steeltoe NuGet packages. Some are built with explicit support for Pivotal Cloud Foundry, (for example, Steeltoe.Management.CloudFoundryCore
has extension methods that configure endpoints and actuator security specifically for Pivotal Apps Manager) some are expected to work on other Cloud Foundry distributions (like Connectors and Security), and some are expected to work anywhere (like Hystrix, Discovery, most of Configuration, and the Management packages that don't have CloudFoundry in the name).
In order to provide a more specific answer, we'd need to get more specific about which parts of Steeltoe you want to use, but the short answer is that anything that isn't purpose-built for a specific feature of Cloud Foundry should work. An indicator that may be helpful is that the areas that are Cloud Foundry specific should have a Cloud Foundry logo in the docs, as currently seen on the page for Connectors.
For what it's worth, we're aware that the non-Cloud Foundry story for Steeltoe usage isn't clear enough. We are beginning to reorganize so that it will be clearer what is or is not for use on Cloud Foundry and ideally provide a clearer (intentional) path for using Steeltoe in other deployment environments.