When you have defined a Security Feature, you must assign it to your users for it to have any effect.

A user can get security features in three different ways:
- Assigned directly to the user
- Assigned to a user group
- Assigned to a permission set

You can use the Show effective security function to show what specific security setting a user will get from the current setup:

User Filters
User filters is a way to apply a different filter on the same field depending on the user:

The user filters are available as Filter Codes that can be used in filters:

Here UF_31 is used on a Security Feature:

Filter Codes can be Builtin or Event Supplied. If you want to create your own filter code, you can create that as an extension and subscribe to a specific event from ACS.