SRM User Interface Add-On 1.0 User Segmentation

We are implementing the new SRM User Interface Add-On 1.0 in multiple countries using SRM 7.02. We would like to migrate certain users to the new Add-on 1.0 UI but also allow other users to continue their use of the current UI in same system.

Is there standard functionality with the UI Add-On 1.0 to support this? If not then, then please provide pointers/solution to develop this.