If you wish to move a particular logger between sub-clients within your login, it's a very simple process to reassign.
1) Log-in (must be Admin) at outpostcentral.com
2) Click on the 'Sites' tab
3) Click on the link representing the logger you wish to re-assign in the 'Site Name' column and a new window will open up
4) Click on the 'Client' drop-down menu and select the location (sub-client) you wish to re-assign the logger to, then click 'Save Changes'