Snapcaht is a popular chat software, this article will guide you to block snapchat in WFilter 4.1 .
Step 1. New a blocking level in “Policy Settings->Blocking Levels”, click “Edit” in Applications tab:
Step 2. Deny snapchat protocol and save setting:
Step 3. Apply this blocking level to computer:
Step 4. Visit snapchat website and check result:
Step 5. You can see blocking records in “Current Online->Real-time Blocking”: