Renaming the kexts is indeed sufficient. For instance:
itlwm_mojave -> min kernel = 18.0.0, max kernel = 18.99.99
itlwm_monterey -> min kernel = 21.0.0, max kernel = 21.99.99
With Clover, you would have placed the different itlwm kexts in the dedicated macOS version folders (eg: 10.14, 12), leaving the other ones in Other folder.