if you want to find about object name e.g. table name and stored procedure on which particular user has permission, use the following query:
SELECT pr.principal_id, pr.name, pr.type_desc,
pr.authentication_type_desc, pe.state_desc, pe.permission_name, OBJECT_NAME(major_id) objectName
FROM sys.database_principals AS pr
JOIN sys.database_permissions AS pe ON pe.grantee_principal_id = pr.principal_id
--INNER JOIN sys.schemas AS s ON s.principal_id = sys.database_role_members.role_principal_id
where pr.name in ('youruser1','youruser2')