Hi Peter,
Yes this can be done, but be aware that this is a customization which is not supported and it might have an impact on future upgrades/migrations.
Question is where do you want this to be visible, on the detail form or on the list form? And what is used to make the difference between VIP CI and CI?
Assuming VIP is marked with a custom field e.g. z_is_vip and that it is on the detail form it should be visible. You will need to alter the htmpl forms for Request, Incident and Problem. And then check for the value of affected_resource.z_is_vip and alter the appearance.
<PDM_IF $args.affected_resource.z_is_vip == "1">
showAlertMsg(' VIP CI ')
</PDM_IF>
Best regards,
Peter