Discussion - Relating Tasks to multiple Accounts

Background: When we log a call, a completed Activity gets created, we also create follow up tasks if the call logged resulted in 'missed call' or 'contact not available'.

Challenge: There are situations where the logged call involves two Accounts. Currently in salesforce we can relate more than one contact to an Activity (even if these contacts are related to different Accounts) , however we cannot relate an activity to more than one Account. 

I am sure this is common Use Case, and I am curious to know how other organizations get around this challenge.