Community VIBs don't have to be signed so CommunitySupported would be the filter to use to get rid of any VIBs that might be signed (potentially with signed ones as well). However, the guide does list only VMwareCertified and VMwareAccepted as the recommended levels, so using Supported as the filter will achieve what the guide recommends.
STEP 1: Connect to each ESX/ESXi host using the ESXi Shell or vCLI and execute the command "esxcli software acceptance get" to verify the acceptance level is set to either "VMwareCertified" or "VMwareAccepted". STEP 2: Connect to each ESX/ESXi host using the vCLI and execute the command "esxcli software vib list" and verify the acceptance level for each VIB is set to "VMwareCertified" or "VMwareAccepted".