That comment is leading. The Cthulhu are wearing aprons that may look similar to Masonic aprons.
That should not imply a direct correlation between Masons and Cthulhu unless sauce can be provided that shows distinct similarities.
Many cooks and maids wear aprons, that hardly makes them Masons or Cthulhu.
I still think you might be reaching a little imo.
A basic search comparing Cthulhu symbols to Masonic symbols shows little to no similarities.
However, I will concede that I am not as knowledgeable about the Cthulhu cultists as I am with the general mythos.
This might interest you. It is a surprisingly decent article on the Cthulhu Mythos.
https://entertainment.howstuffworks.com/arts/literature/cthulhu.htm
Ironically, I think you might find that Masons and Cthulhu cultists would both laugh or even be offended by being compared to the other.
I may be missing the mark, I assumed we were all aware of the FICTIONAL aspect of Lovecraft and Cthulhu.
I thought the original post about the masonic aprons was referring to individuals that actually follow it as a religion.