Hello dear community.
How can I exclude packages from being updated by Pacman? 
In this case, I don’t want to update an AUR package and permanently exclude it from being updated. 
Where can I find the config file where I can change this?
I’m not just specifically interested in AUR here, but it would be interesting to have a general option to manually exclude packages from being updated and then update them manually if necessary.
Thanks in advance. 
/etc/pacman.conf → IgnorePkg = pkgname
Can I then update the package manually via Terminal or do I have to exclude the command again?
pacman will never update AUR packages.
So the package is replaced on the ignore list, which can also be seen in the pacmanmanager.
There is no such thing. 
pamac update --aur --ignore <package(s)>
Pamac 
Great, now I have two options.
Where does he write that? In the pacman.conf too?
I just want to add that ignoring updates of specific packages can put you in a partial upgrade state, where libraries get updated, but the packages that depend on them do not get updated, causing incompatibility between the libraries and packages. Things will eventually break.
No, that’s the command you would type in the terminal window (or at a tty) for updating while ignoring that specific AUR package.
Thank you, yes I understand that. I’ll be careful. 
Surely you can write this manually into the file that is rewritten with this command? Which one is it?
Command can used in a Terminal without reconfiguring pacman.conf
Or AUR package can be added to ignore list in Pamac GUI Preferences > Advanced tab
Ignoring an AUR package update is less likely to be a problem than ignoring a Manjaro repository package
Oh, I understand. Yes, it was even noted there. Oh, I didn’t notice that in the settings because I didn’t want to ignore any packets until now. OK, I understand, easier way with the command, but in the end it’s exactly the same. 
No need to write anything into a file. You simply type that command and your system will be updated, but that one package will not.
You could of course create a shell alias for it, or better still, a shell function or a bash script, so that you can use it with other AUR packages you wish to exclude. An example of a script follows below. 
#!/usr/bin/env sh
pkglist=$@
pamac update --aur --ignore "$pkglist"
Save this under your ~/.local/bin with a suitable name — e.g. custom-update — and give it execute permission. Then, next time you update, simply do it by way of the name of the script.
Sounds interesting too.
When you enable third party builds in Add / Remove Software app - you also have the option of setting an option to check for updates.
When enabled - this option is the cause of trouble for many users.
Disable Check for updates on the Third Party tab.
To setup a regular check for updates to your custom scripts (hosted on AUR)
See → [root tip] [HowTo] Check if your AUR build scripts have been updated
If a user does not know how to ignore a package update in pamac-manager GUI they should not have this option enabled, especially at this time when there may be a delay in Stable branch updates pending release of Manjaro 25.0
Users can still check for AUR updates in Terminal using pamac-cli as an AUR helper
To show if new versions of packages are available and if any packages are out of date:
pamac checkupdates -a
Manjaro Wiki - Using Pamac CLI - Updating the system
Inexperienced users that are not very familiar with AUR build process can use the dry-run
option to simulate building a package:
pamac build --dry-run [package]
THIS POST IS REALLY REALLY GOOD!!! Thank you very much and congratulations for such answers.
I will try several of this solutions.