You can create a new security group and then make that contact a member of that group. You can then select what the contacts within the group have access to both in matter of interface and operations that they can perform within the menus that they have access to(of what I see you can't restrict based on country).
Thank you for the quick reply, I will try it out and update here
If you want, you can review the following webpages: Controlling Access to your Eloqua Contacts: Six Key Considerations When Implementing a Contact Level Security (CLS) Sol…
This should give enough information to get you started.