Hello Jason and welcome to the Community!
If I'm understanding correctly, you're wanting a link to a word document that then pops up the document within the same window to display content, in this case, a workflow.
Confluence Cloud doesn't allow for user macros due to performance issues they can/will cause. More on this at Functional differences in Confluence Cloud vs. Server.
With that said, there are marketplace apps that can allow for extended functionality, here is a preset search for Atlassian Marketplace | Confluence Cloud | Office Connector.
If your files are hosted or attached within Confluence you can also simply link to the files, though they won't open in a pop-up, more information on linking can be found at Insert links.
We’re excited to introduce external collaboration for Confluence, now available in early access. It is available to preview for Confluence Cloud Premium and Enterprise customers. (If you're not on ...
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