Hi Karim,
I’m sorry, the Life Fitness IC5 is not a currently supported bike for Zwift. I’ll gladly add this model to our list of requested trainers, though!
Here’s a link to our hardware page so you can see what trainers/bikes are supported on Zwift. It looks like you could still go with the Life Fitness IC 8 Indoor Cycle. Yay!
If you need any additional help on Zwift, feel free to submit a support ticket. 
Ride On!