Hide Non System Processes
HideNonSystemProcesses is a sandbox setting in Sandboxie Ini.
Use the 'HideNonSystemProcesses=y' option to prevent sandboxed processed from seeing processes running outside the sandbox.
Related Sandboxie Plus setting: Sandbox Options > Advanced Options > Privacy > Hide Non System Processes
Related Sandboxie Ini setting: HideHostProcess, HideSbieProcesses