The undocumented function to read the log is fn_dblog. It's a table-valued function (hence used in a select statement), takes two parameters, start LSN and end LSN, both can be null.
It's completely undocumented, so good luck interpreting it.
You won't find host names in there, it's a transaction log, not an audit log
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability