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We recommend you use this filter when you use a broad scoping application control policy, such as any file with a system file owner for a Whitelist, so that you don't catch applications launched by system services or accounts.
LocalSystem and Service Application Filters
This filter The Application Context filter is rarely used in environments. You would use this it to target or limit application control policies to applications only launched by only the Local System or Services.
Service Application Filters
Same This is the same as for the LocalSystem and Service Application filters, except it targets only Services that get executed.