I suppose you could use some javascript to hide the button under specific condition.

Another way would be to inherit the write() method and do you check inside it. You wouldn't hide the 'edit' button but you could block the users from editing the object.    

Hi,

For this what you have to do is that create a access rights for this. Either you can do it from the UI or from the code. See the sample to see how it can be done from the code.

id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
id_for_this,a_name_for this,module_name.model_model_name,your_group_name,1,0,0,0

Above is a general case,

see a sample with the model sale.order for the group named test_group

id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
sale_test_group_access,sale.test.group.access,sale.model_sale_order,test_group,1,0,1,1

Once you have applied this access right, the users in group test_group will not see edit button for the model sale.order

You can create file inside security folder with the name ir.model.access.csv and mention this in manifest file

Thanks