JSFiddle - React, Tailwind, and code Playground

by Sillvva

HTML

<div>Everyone sees this part of the message</div>
<div showto="gm Sillvva">Only the GM and Sillvva see this part.</div>

CSS

[showto] {
    display: none;
}
[showto~="gm Sillvva"] {
    display: initial;
}