Resource user condition

docs/how-to/build-policies/abac/building-abac-policy.mdx

@@ -111,6 +111,11 @@ Our conditions for this set will be setting **time** using the comparison **grea
 
 ![Resource Set Example](/img/abac/resource-set-1.png)
 
+### Compare Resource and User Attributes
+Sometimes, you may want to create conditions that compare resources with user attributes, such as matching a resource's risk score to a user's risk score. In Permit, this can be achieved using the `(ref)` operators. Here's an example of such a condition:
+
+![User/Resource Condition Example](/img/abac/resource-user-condition.png)
+
 ## Apply Permissions to create an ABAC Policy
 
 Now that we have set up all the attributes for users and resources, along with the user and resource set, we apply permissions