It is currently not possible to dictate which users need to use Wonde as the third party identity provider as you see fit when setting that service up via the Google Admin Console. It is however, possible to limit the effects of the Wonde <> G Suite third party IdP functionality, to Chromebooks.
In order to limit the effects of this functionality you must first login to the Google Admin Console at admin.google.com
Go to Security >> Set up single sign-on (SSO) with a third party IdP >> Network masks
Enter 188.8.131.52/32 - Wonde will now longer be the required IdP for all users on your tenancy no matter the type of device they are using.
The caveat to this type of setup is that when students click on G Suite apps on the Wonde dashboard, they will not be authenticated automatically. Instead, they will need to type in G Suite credentials to sign in.