Map Sharing - Select Province(s)

I would like to propose installing more options for creating short term alliances such as a select province(s) option when map sharing.

Example:

My current game has three teams. One has Germany, one with England, and one with Russia (me). I would like to create a short term alliance with England to attack Germany, but I don't want him to see all of my troops on each of my battle fronts because we will eventually be enemies. I would like to be able to select Kiev and he can select Portsmouth for map sharing.

Also, a rehash on my other suggestion. Please, add a feature to view only your personal troops. In large battles with multiple nations involved it becomes easy to overlook some of your troops.

Thanks!