Stop user from select virtual network from other VDC

Hi,
Are there anyway to prevent user from select virtual network from other VDC?
Currently user can select all virtual networks from all VDC.
I did remove all groups from default VDC already.

Thank you.

You should look at using ACL’s by default an acknowledgement is created when you create a new group but you can remove / alter this also , what do you have as your acls currently ?

Hi ,
Currently vnet permission only allow for owner of this vnet only

PERMISSIONS
OWNER : u–
GROUP : u–
OTHER : —

However, other user from other group or user even from other VDC can select this vnet and start an instance.