Linking fields among Workspaces

Content

Dears,

Is there anyway to connect 2 fields from different workspaces with each other?

Explanation:

I have a menu field called "Product_Code" in incident workspace + a menu field called "Product_Code" also in another custom object workspace.

The 2 fields have the same values, I entered some entries in the custom object workspace then created a report including "Product_Code" for the incident workspace and the custom object workspace

It`s normal to have the results for custom object fields without incidents fields And to get the results of incidents` fields without custom object results

What I need is to map the values for "Product_Code" between the incidents and custom object results.