[PC Gamer]

After reading what Neuro Toxin posted you may consider editing your sourcemod/configs/admin_overrides.cfg file.

Example of how you might do it to restrict commands to players with a certain flag:

Overrides
{
//Allow any player to use
     "sm_bedragon"     " "
     "sm_beskeleton"   " "
     "sm_stopsound"    " "

//Allow VIP Player to use
     "sm_vipcash"     "a"
     "sm_trails"      "a"
     "sm_taunt"       "a"

//Allow Administrator to use
     "sm_buddha"     "k"
     "sm_noclip"     "k"

//Owner use only
     "sm_besuperfox"     "z"
     "sm_bewizard4"      "z"
     "sm_betheeye2"      "z"
     "sm_beyetiboss"     "z"

//Custom Overrides for Model Manager
     "modelyeti"     "k"
}