By default, all members who land on your profile page can see the list of your contacts under the Contacts tab. This allows members to look for relevant business links within their network. You may however limit the visibility of your contact list:
Mouse-over your photo in the upper right-hand corner and click Your account,
In the right-side column, click Privacy Settings.
Move down to Your contact list and choose who can see the list of your contacts:
Only your contacts
All Viadeo members
Tip: manage close to 40 visibility settings on your Privacy Settings page.