Marketo Activities visibility by workspace

Hi,

Given that a contact is shared between two different workspaces, e.g. it belong to one workspace but is visible and usable in another workspace, is it possible to isolate the marketo activities between the workspaces? For example: users in workspace A run a campaign on Contact X and users in workspace B run a campaign on Contact X, is it possible to restrict visibility of activities (such as "visited website", "opened email", "interesting moment") to the appropriate workspace only?

Thanks ahead for any feedback.