This may be fixed in current version. I hope the instructions are OK
With tenant protection rules on both BO's the values for the category list are available to all tenants from a Category Combo in Company where the combo values are created from a query within the control.
BSV file is attached
BO: Company
BO: CompanyCategoryList
Create 2 tenants (tenant1 & tenant2)
Create 2 contacts (user1 & user2)
Create 3 Categories linked to tenant1 (Category1, Category2, Category3)
Create 1 Company and assign Category 1 and tenant1
Login as tenant1 and verify company and category are visable
Login as tenant2 and create a company and the 3 tenant 1 values are in the control. A Search of the company and category BO do not find any records when logged in as tenant2.