Document private info disclosure policy in "Moderator Instructions"

Author: per1234

content/categories/staff/moderation/_topics/moderator-instructions/1.md

@@ -15,6 +15,7 @@ For an overview of the Discourse moderation system, see the "[**Discourse Modera
 - [Policies](#policies)
   - [Do not block IP addresses](#do-not-block-ip-addresses)
   - [Do not delete accounts](#do-not-delete-accounts)
+  - [Do not disclose private information](#do-not-disclose-private-information)
   - [Use flags to delete posts](#use-flags-to-delete-posts)
 - [Flags](#flags)
   - [User-submitted flags](#user-submitted-flags)
@@ -105,6 +106,23 @@ The Arduino company has [a policy](https://forum.arduino.cc/t/about-user-account
 
 ---
 
+<a name="do-not-disclose-private-information"></a>
+
+### [Do not disclose private information](#do-not-disclose-private-information)
+
+In order to facilitate moderation work, the forum's moderator interface provides some information that is not publicly available:
+
+- IP addresses
+- geographic data associated w/ IP addresses
+- accounts associated by IP address
+- identification of users submitting reports
+- content of messages submitted with a report
+- identification of staff member who performed a moderation action
+
+This information _**must not**_ be shared with anyone other than fellow moderators.
+
+---
+
 <a name="use-flags-to-delete-posts"></a>
 
 ### [Use flags to delete posts](#use-flags-to-delete-posts)