If you are trying to restrict the data usage on your device, kindly navigate to Android–>Mobile Data Management–>Data usage restrictions. You can find the option to specify the data usage limit and also to notify the user/admin or both.
If you are referring to App-wise restriction, please go to ‘App-wise restrictions’ under ‘mobile data management’ and add the app for which the restriction is to be applied. You can then click next and choose to restrict the data usage on a daily basis and specify the data limit (can be set to 10MB).
Kindly check this help document for more information on the same.