ReQorder uses the Qortal API to read data from the blockchain that is stored on the device running your Qortal node.
You can, through SHH tunneling, access the Qortal API from a different machine, which means that you can run ReQording sessions from a different machine than the one running your Qortal core. However, it is recommended to do the actual ReQording on the same machine, as some data pertaining system resources such as internet data usage, CPU temperature and blockchainsize will not be accessible or relevant when ReQording remotely.
Also, since your machine running Qortal is probably running 24/7 and due to the low resource requirements of ReQorder, you might as well run it on the same machine as the core. You can create an SSH tunnel using a program called 'SSH Tunnel client'. You can download it and find instructions on the Qortal Wiki.
Another SSH tunneling program that can be used is 'PuTTY'. The following images were taken from the Qortal Discord SSH thread, they contain instructions on how to create an SSH tunnel. Click on the images to open them in your browser.
SSH tunneling can also be used to remotely control a ReQording session on a different machine (particularly for those running a headless Linux OS on a Raspberry Pi, but possible for any system).
This way you can run a ReQording session on one machine and present the data on another one.