I am trying to customise the admin sale order grid collection.
I have created an custom `sale_order` attribute `store_manager`. These store managers are the admin users eg: 'manager1', 'manager2'.

1) Orders are manually assigned to 'manager1' or 'manager2' -- **this part is done**

2) Now I am trying to set filter on sale order grid collection, so when manager logged in to there system they can only see there orders.

In Magento 1 we have `sales_order_grid_collection_load_before`, `sales_order_grid_collection_load_after` for this requirement .

Is tried to such event for Magento 2 but didn't get any success. 

**My Queries :**

Is there any such event like (`sales_order_grid_collection_load_after`) in magento 1 which full fill my requirement?

Is there any other way where I can set filter to sale order grid collection?

Note : I already search for this on google but didn't get any perfect solution.