No. VAC only runs when you launch CS 1.6 through the official Steam client. Non-Steam versions bypass VAC entirely.
Programs like "Steam ID Changer" have become popular within the CS 1.6 community for their ability to work with various ID formats and provide on-the-fly changes. steam id changer cs 16 full
Small .exe files that generate a new random ID every time the game starts. steam id changer cs 16 full
Have you ever had to change your ID? Did you find a safe method, or did you just find a new server? Let us know in the comments below! steam id changer cs 16 full