DaaS - Client IP detection for Network Location Service

How is actual Client IP determined for Network location detection, when traffic from both internal and external Clients is routed through a Proxy? This is important when Clients access the Cloud Workspace through a Proxy, irrespective of Client's location - inside or outside corporate network...

Unable to limit visibility of applications to specific user groups

Previously able to restrict apps visibility to specific users or user groups using the 'Limit Visibility' option through the app properties. Now all company's users can see all apps when logging to the Cloud Workspace...