How to install 2 or more same apps (parallel install)

Hello,

How to install 2 or more same apps at the same time? So i can use those apps simultaneously flawlessly.

You mean a different version of the same software?

No.

I mean the same version. The same software. But i’d like to set them with different setting/configuration.

So, i need to open 2 or more same apps at the same time. Same version of apps.

For example bash’s .bashrc ?