I have created a custom module called "Company" where I can add companies to a Custom table.
I have followed the "Creating custom binding classes" documentation to create a binding class which allow me to assign users (Admin Users tab) to the created companies.
In the "Admin Users Tab", I can click on the "Add items" and the site shows me a list with all the users that I can select.
Is there any way I can filter the user list to only show the users that are not already assigned to a company?
You should go to the Modules -> navigate your module -> Edit -> User Interface -> navigate binding page -> Properties -> Dialog where condition should allow you to eliminate those items I believe.
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