As we do not write any TTT code into ULX, you likely need to ask whatever author that wrote your TTT code to remove or adjust notifications.
That being said;
There is no way with default ULX commands (ie, stuff we wrote into ULX) to have only 'some' commands seen but not others.
ULX does allow for different levels of notification echo (none/anonymous/full), and then allows group access to commands not normally echoed fully (certain group could see the anonymous command runner, but lower could only still see anonymous), but not on individual commands.
Questions about echo and the echo levels have indeed been asked and answered elsewhere.