Hi Stuart,

That's correct.  This is a current limitation of the blog module.  Unfortunately, the Blog_Entries table doesn't have a column for tracking the actual author of the entry.  This means that your entries will always show up as if they were authored by the user which is associated with the blog to which your multiple users are posting. 

Another workaround that some have used is to create a user with a generic sounding name, say ABC Team, and allow a group of users to log in using this shared user account to create team blog entries.  As each team member posts entries to the shared blog, they would be encouraged to sign each blog if the identity of each team member was important in the blog postings.  

HTH,

Don