You can limit an user's view of mini markets within the mini market module by assigning their role to a purchaser group which has been limited by mini markets.
📌 Note: This will impact all users assigned to the role.
Click the Admin Cogs along the top bar.
Click Organisation Administration, then click Roles.
Locate the role and click Edit to access.
Stay the details tab and locate the restrict purchaser groups section.
Select the purchaser group from the list.
Click Update.