Doesn't have to be your system admin. You can create a regular registered user for the sole purpose of holding onto groups.

Will it be ok for a user to have hundreds of groups? Is there a limit?

You can use CSS to hide them under the Users tab or just not display the Users tab at all.

I will try to see how to implement this

Use substitution parameters to specify who you want the information to come from. For example the below would output cb_company for the user who fired the trigger.
[cb:userdata field="cb_company" user="#me" /]
You also have access to the trigger variables itself and if it's a registration trigger then you've access to the raw user data via var1 substitutions. Example as follows.
[var1_cb_company]
The below will also work.
[cb:userdata field="cb_company" user="[var1_user_id]" /]

Yes, this way [cb:userdata field="cb_fieldgrp__0__cb_company" user="[var1_user_id]" /] it worked an brought Admin's company. It is not during registration but onAfterUserApproval. Perfect, thanks



Concerning the 2nd part of my original post

Not sure I understand the need for this given you already have a Group tab visible on their profile that will display it and link to it.

Inside the active tab a user sees when visits a profile, I have some fields and I need one of them to be a link to the specific group and the specific tab of that group "Users".

At any rate the non-SEF URL that you should use is as follows.

index.php?option=com_comprofiler&view=pluginclass&plugin=cbgroupjive&action=groups&func=show&id=GROUP_ID_HERE

I tried index.php?option=com_comprofiler&view=pluginclass&plugin=cbgroupjive&action=groups&func=show&id=3#cbtabpanegrouptabusers but it doesn't take me to users tab directly. How can I do this?

You will need access to the group id. How you get that is entirely up to you. You could store it after creating the group, you could use a Code Field to use PHP to get their group, you could use a Query Field to use SQL to query for it.

Thanks, I will try to work it out

Yes. There is no limit. My local test has my admin user owning over 100,000 groups. It's performance tested to scale.

Perfect, I will do as you say.

Add &tab=TAB_NAME_CLASS_OR_ID_HERE to the URL to link to a specific tab. So for example &tab=Users should work.

Yes, that worked, thank you.

You can use CSS to hide them under the Users tab or just not display the Users tab at all.

I have implemented this but I can't find how to set it only for the specific group category. .gjGroupUsersUserOwner hides all the owners from all groups under Group tab no matter the category. The group category id that I need to hide its owners is 1 and I can't find something like .gjCategories to narrow it down. Is there another way of doing it?

Yes!
That worked, thank you Kyle!
Spent last night struggling with this!
You really know the CB environment well after all !!!