Hi
Do you mean linking one mobile device to a facility? If so, that may not be feasible.
If you intend to use android devices, then you may not fully run away from installing a generic gmail address for the facility. However, you cannot also lock an email to a facility when using the application.
As a matter of design, no you cannot define a user and lock it to a specific geographic area.
I would suggest that you use cascading select approach where you start with a larger grouping of the facilities such as the provinces or districts. The approach would be to use this as described within our articles and the discussion that has happened below
On the issue of users you can also create logins that are also specific to a facility using the same cascading approach.
Normally it is much easier to initiate your form and then ask for support o the best tweeks. If you need much more advanced customizations, we also recommend you post on the job boards where you can get other users who may be able to support you directly based on your mutual agreement.
Stephane