This forum is closed. Thank you for your contributions.
Ahsan Kabir
Configuring audience is nothing but configuring to target content based on SharePoint groups, distribution lists or security groups or rules-based system to create a global audience.
http://office.microsoft.com/en-us/sharepoint-server-help/target-content-to-specific-audiences-HA010169053.aspx
The audience targetting is not applicable to workflows
Sundar Narasiman