Restrict Content types allowed in canvas in certain context

It would be useful to set limits within a page, section, or table column as to what types of content can be used on a given canvas. This to keep a standard format for certain types of content.

My use case is that I have set up a table with a canvas-type column that automatically exports as content for a wordpress post. Due to the way the content is processed on that journey, only certain types of content end up showing correctly on the wordpress page. For example, headings, bold, italics, etc all show up, but callouts, pull quotes, and other coda specific items do not.

Thus: I would like to restrict what can be added to this specific canvas column to only those types of content that will work with the rest of the workflow.

This should also include the ability to choose which templates are allowed in a specific context.