You can create custom vibration on LG G2 as the vibrate for incoming calls, but unlike Galaxy S4, you can not assign specific vibration to specific contacts. To create custom vibration on G2, do as follows:
1. Open Settings and go to Sound tab
2. Under Ringtones & Vibrations, open Incoming call vibration.
3. Tap the Plus icon on the top right to start creating your unique vibration
4. Save your new vibration pattern
Lean More LG G2 Tips and Tricks