We use Server based ini for the users. There are over 100 systems including sandbox systems that are added to a single ini file. Most users only logon to ECC Production system but see all the 100+ systems.
The idea to have separate ini for Production, Quality, Development and sandbox. If the user has an account in quality, then he/she sees Production and Quality in the Logon pad. If the person has an account in Dev, then the person will see Prod, QA Dev and Sandbox systems.
There is a work around by maintaining more than one ini in different directories. But when a new Production system is built, then we have to add those to three ini files which is possible but has less takers.
I like to explore if there is easier work around by adding one system in just one saplogon.ini.
Just FYI.
I submitted this as a potential idea. Please vote if like the idea.