By default WP Security Audit Log keeps a record of both the automated and manual Custom Fields changes that happen on your WordPress. Though it is possible to exclude the recording of either a specific Custom Field or a group of Custom Fields. When you exclude a Custom Field from the monitoring any changes that happen to that Custom Field will not be recorded in the WordPress audit trial.
How to Exclude a Specific Custom Field
There are two ways which you can use to exclude a specific Custom Field. The first option is to exclude it by clicking the option Exclude Custom Field from Monitoring in the alert reporting the Custom Field changed, as shown in the below screenshot.
Alternatively you can exclude a Custom Field by navigating to the plugin’s Settings, click on the Exclude Objects tab and specify the Custom field you would like to exclude in the Excluded Custom Fields input field shown in the below screenshot. Click Add once you specify the name and click Save to save the plugin settings.
Exclude Custom Field Monitoring
If you want to exclude all sort of Custom Field changes from the WordPress Audit Trail you have to disable the alerts that report WodPress Custom Field Changes. There are specific alerts for Custom Field changes in posts, WordPress pages and custom post types.