Currently, the syntax for showing content to the current user is this:

[[module ListUsers users="."]]

So perhaps the best solution would just be to accept a different value for the 'users' attribute, rather than creating a new special-purpose attribute for this?

Keeping in mind of course, that the main purpose behind the unfinished ListUsers module is to list users. Being able to control who can view content is only a side-effect, rather than the main purpose of the module.

Well the issue here is that users="." is supposed to display the current user. When no user is logged in, it displays nothing. Logically it should display "Anonymous", because that is the user at that moment… An anonymous person is using Wikidot, so it should display Anonymous user.

Do you see my point?

I should be able to create code that only Anonymous users can see with SUO, but I can't, because of this "feature".

It would be cool if you could select a certain amount of users by a data form value they have filled out on their profile (for sites that have data forms in their custom profiles on their site). I know this wish was accepted with ListPages, but to be able to do it with the ListUsers module would be amazing. I just wish there was more options for the ListUsers module in general.

It would be cool if you could select a certain amount of users by a data form value

Selecting by dataform values was accepted for development by Wikidot just a few days short of a year ago. But frustratingly they refuse to make any comment about it or other accepted wishes, give any sort of indicative timescale or even say whether it is being worked on.

The wish above would be really effective tho, because I would be able to use this in the top bar instead of just having it for per site members.

Here's how I'd like to use this module: signed in users can see important parts of the page, while anonymous users, instead, see an image that shows them the benefits of signing in. Simple.

Hi, I'm Nath. I'm from the collaborative fantasy writing community AGIAT and I discovered this.

It's not what you're looking for, and I'm 14 years late. But I found out that simple CSS can do the trick.

[[module CSS]]
.if-logged-in,
.if-not-logged-in {
  display: block;
}

.user-logged-in ~ .if-not-logged-in {
  display: none;
}
[[/module]]

[[include component:not-logged]] Only if you want to have it accessible as a component. Create a page called 'component:not-logged', paste the CSS into it, and then you can call it whenever you use that code. You may already know this, but I'm posting this for people like me who came looking for solutions to that problem.

[[module ListUsers users="."]]
[[div class="user-logged-in"]]
[[div class="if-logged-in"]]
✅ You are logged in %%title%%¹. This is content A.
[[/div]]
[[/div]]
[[/module]]
[[div class="if-not-logged-in"]]
❌ You are not logged in. This is content B.
[[/div]]

.if-logged-in and .if-not-logged-in elements are made visible by default.
However, if an element with class .user-logged-in appears before .if-not-logged-in, then .if-not-logged-in is hidden. This only happens > if the .user-logged-in element is present, which indicates that the user is logged in.
[[module ListUsers users="."]] lists the current user (if any). If someone is logged in, the user-logged-in block is rendered.
If the user is logged in, the user-logged-in div is present in the DOM, which triggers the CSS to hide .if-not-logged-in.
If the user is not logged in, .user-logged-in is not rendered, so .if-not-logged-in remains visible.

It’s the solution I found to show content exclusively to anonymous users, without 'affecting' logged-in users.

Sending greetings from the Spanish community.