If I understand correctly, you want to know which VMs are members of which security groups, within the Web client? Go into Networking & Security -> Service Composer -> Security Groups tab.
Locate the security group, and find the "Virtual Machines" column for that group.
Click the number in the column to see a list:
If the question is how to setup a security group to make sure it grabs some VMs dynamically, create a new group, the simplest is to grab them by VM name contains:
Create the group, and check the VM members on the new group (83 from my example). The group membership is created/updated instantly:
Obviously, the title wasn't totally helpful.
I would like to have this information in vRealize Network Insight.
I apologize for the misunderstanding.
Ah, sorry I didn't pay attention to what sub-community it was posted in (my apologies).