I did study this issue a long time ago and to the best of my memory, the answer is a resounding no.
His target was Hollywood, because the Hollywood actors and others have always had leanings to the left. I am sure there were some who belonged to the communist party, which was their right under the constitution. There were others who attended meetings or knew others who attended meetings.
The fact that the Congress allowed a Committee on Un-American Activities to be formed was a travesty in itself.
The red scared destroyed a lot of lives, ended many careers and is certainly a black mark in our history, about on the same level as the interment of Japanese American Citizens in camps following the bombing of Pear Harbor. There was no due process, no appeals, nothing.
Regarding the Red Scare, how would actors and writers have access to information that would be of any use to the Soviet Union. It was nothing more than a vehicle to further the influence of Sen. Joe McCarthy.
News reporter Edward R. Murrow of CBS deserves much of the credit for bring that travesty to an end.