There are multiple ways on how to implement what you need in Adaxes.
First of all, you can create multiple Property Patterns and make each one effective only for a specific OU. But that's not the best way, I think.
I suggest you define a Business Rule that will be executed before creation of Groups and modify the group name based on the parent Organizational Unit.
For details, see Validate/Modify User Input Using a Script.
If you have any difficulties with the script, just let me know and we'll help you to implement it.