Yes you can either configure a sharing rule to assign to a group where you can add that group in sharing rule . Or you can write apex sharing to sharing record .
1) You can also use manual sharing. There is button available on detail page layout after sharing made private, refer below image
2) Some ways through coding (via customObject_share ) https://developer.salesforce.com/page/Using_Apex_Managed_Sharing_to_Create_Custom_Record_Sharing_Logic
Yes you can either configure a sharing rule to assign to a group where you can add that group in sharing rule .
Or you can write apex sharing to sharing record .
1) You can also use manual sharing. There is button available on detail page layout after sharing made private, refer below image
2) Some ways through coding (via customObject_share )
https://developer.salesforce.com/page/Using_Apex_Managed_Sharing_to_Create_Custom_Record_Sharing_Logic
Please let me know if it helps.
Thanks
Gulshan Raj