Hi Kurniapank,
You can limit user activity base with the AOI boundary by setting the properties in the Workflow Manager Administrator. If you click Settings->Workflow Manager System Settings ->Area of Interest you can see the types of restrictions that can be implemented using the AOI for a Workflow Manager Geodatabase.
You can configure the AOI layer in the same Workflow Manager System Settings ->Map View where you can select an AOI specific map that you have loaded into the system. If you are working online configure the AOI feature layer in ArcMap how you would like it and publish that as a service. Then you can use the AOI rest end point to access the layer in a web viewer and have it display correctly in an online map.
Hopefully this helps,
Cheers,
Michael