Yes it is possible. You can invoke TASKLIST using xp_cmdshell :
exec master..xp_cmdshell 'TASKLIST'
Conclusion:
Image Name PID Session Name Session
========================= ======== ================ =========== ============
System Idle Process 0 0 4 K
System 4 0 140 K
smss.exe 212 0 956 K
csrss.exe 332 0 5,560 K
.....
sqlservr.exe 1492 0 92,012 K
sqlservr.exe 1532 0 95,928 K
.....
Note. To run xp_cmdshell, you must have the correct permissions and server configuration parameters. Read the comments section on MSDN to understand how to enable xp_cmdshell