I will be glad to assist you with this request. You will need to run the following query against the qcsiteadmin database, so you may need to get your DBA involved if you don't have access to the database.

Report who's accessing Project A:

SELECT [START_TIME]
,[END_TIME]
,[DOMAIN_NAME]
,[PROJECT_NAME]
,[USER_NAME]
FROM [qcsiteadmin_db].[td].[SESSIONS_HISTORY]
WHERE PROJECT_NAME = 'Project_A'
Report who's accessing Project B:

SELECT [START_TIME]
,[END_TIME]
,[DOMAIN_NAME]
,[PROJECT_NAME]
,[USER_NAME]
FROM [qcsiteadmin_db].[td].[SESSIONS_HISTORY]
WHERE PROJECT_NAME = 'Project_B'
Report who's accessing Projects A and B:

SELECT [START_TIME]
,[END_TIME]
,[DOMAIN_NAME]
,[PROJECT_NAME]
,[USER_NAME]
FROM [qcsiteadmin_db].[td].[SESSIONS_HISTORY]
WHERE PROJECT_NAME IN ('Project_A', 'Project_B')

I hope this helps!