How to give user wise permissions

I have three organization and for that three users
Organization A User A
Organization B User B
Organization c User C

if user A create lead then this lead cannot see to User B and User C
if user B create lead then this lead cannot see to User A and User C
if user C create lead then this lead cannot see to User A and User B
how to give this kind of permissions

Hii @Rahul7218

To achieve user-specific lead permissions:

  1. Create roles for each user.
  2. Assign roles to users.
  3. Set User Permissions to allow leads for each user.
  4. Optionally, use a Client Script to hide or make leads read-only for other users.

i have create roles and users and assign role to users still that user can see all leads

for hiding leads i think you need to create Client Script

Through user permissions: User Permissions