If your robot uses external execution, ie moving the mouse, typing keys, or looking at elements or images on the screen then it’s not possible.
However, if it’s internal like executing tasks directly in the window or application object, then it is possible. This could be done through vb scripting or other languages (and yes even in websites). With UiPath, it most likely won’t work because it doesn’t look in the application as an object, like other languages would. For example, clicking a button uses a click action, which in contrast to vbs/vba you would use the object directly (ie.document.element("").click and so on).
So in summary, it’s definitely possible in other scripting platforms but UiPath will create challenges which is why using a dedicated machine with multiple users is the preferred method to deploy your robots.