Ignition User log-in from only one client or session

Ignition
10 
# Get logged in user and project name
tagNames = ['[System]Client/User/Username', '[System]Client/System/ProjectName']
loggedInUser, loggedInProject = [tag.value for tag in system.tag.readBlocking(tagNames)]

# Get running sessions
sessionData = system.util.getSessionInfo()

# Sort the session dataset into a dictionay by project and user
sessionDict = {}
for row in sessionData:
	# Ignore if designer session
	if not row['isDesigner']:
		if row['project'] not in sessionDict.keys():
			sessionDict[row['project']] = {}
		if row['username'] not in sessionDict[row['project']].keys():
			sessionDict[row['project']][row['username']] = 1
		else:
			sessionDict[row['project']][row['username']] += 1

try:
	print sessionDict[loggedInProject][loggedInUser]
except:
	# Return None if not exists
	print None