What are the processes associated with FileVault?

We're currently trying to build VPN realms for Mac users to have their own VPN into our corporate network. In order to make this happen, it requires adding the actual process service names associated with FileVault to a check script that looks for these running processes on the Mac. If said processes are not active on the Mac (meaning FileVault has not been activated), then the user will not be granted remote access into our network.

Does anyone know what are the actual process names connected to FileVault?