This question is more relevant to the specific environment,You can use something like this.
Target Application
Target Application : First three letter of host name ex 'ABC'
First three letter of Application type : 'UNIX or WIN'
Specify Local account or domain account : 'LA or DA'
This is what you get at the end "ABC_UNI_LA" or ABC_WIN_DA, This will allow you to have very good search capability when you search Target Account based on Target Application.
View Policy: You can have multiple Password View policy isolated by team/deparment/location
For instance you can user UnixTeam_PVP or UK_Unix_PVP.
Target Group : It can be based on Device type, You can have multiple target group for device type.
For all Windows Domain server : Windows_Target_Group
Unix Server : Unix_Target_Group
Hope this helps you in some way, But as i mention it is all up to organization to organization.