I think it'd probably be helpful if we could get more clarity around your exact use case here, Jeffrey.
Josh is right in the sense that a program that exists in one workspace isn't "visible" to other workspaces - i.e., it can't be referred to in smart campaigns, etc. Some types of assets, however, like landing page and email templates, can be shared across workspaces if placed within a shared folder in design studio - the doc Josh linked to would show you how.
However, a key distinction: you can clone programs across workspaces - if the workspace you're cloning to has access to the assets within that program (i.e., if it can see the email template/landing page template in use by assets within the program because those templates are in a shared folder).
So if you're asking for visibility over the program, then no. If you're asking for visibility over the assets, then sort of. If you're asking for cloning, then likely yes.
Hope that helps 