How to create access specifier for user

How to create access specifier for user can edit or delete record who created record other user only can view if assign in the group ?

And I also want to remove button for all user who can assign in the group only can admin have access for the remove button who create group.

Hi,
I didn’t understand the second question, the first one sounds like a security group configuration:

Thak You @crmspace,

Your First Questions answers is right i can manage this security group management.

PFA, Second Question is how to hide remove button for other user who assign in the security group ? Only Admin or owner user can see this Remove button.