Tomasz Oczapowski — this is possible by using a hack :)
What you need to do is create a new dimension per external link for each record. Then for that dimension set the linkTemplate to be using. As an example:
Headers: Name —Salesforce Account -Facebook Account — Instagram Account — Twitter Account
Values: Tomasz Oczapowski — Tomasz Ocza — None — [at]TomaszINSTA — [at] TomaszTwitter
So to open one record in several external systems you need to create a dimension for each, specify the link template, and have the value as the linktemplate attribute.
I hope this helps!