These men are not physical fighters, but lead men, so in my opinion, yes they can carry on just as they did previously. Also there was another taliban released to Qatar, under these same conditions that left, even though he was under orders not to-
"The State Department's concerns about Qatar's supervision of released militants were detailed in a diplomatic cable dated February 2009 by the U.S. embassy in Doha, Qatar's capital, citing the case of Jarallah al-Marri, a former Guantanamo detainee released to Qatar in July 2008.In the cable, the U.S. embassy criticized Qatar for failing to follow through on promises to bar al Marri from leaving Qatar, noting he made two trips to Britain since his release from Guantanamo, and that during his second visit, in early 2009, British authorities arrested him."
Can Qatar Keep Released Guantanamo Inmates From Plotting?
So as I understand it, the five Taliban are confined to Qatar. Does that not mean that as long as they stay in Qatar, they can freely engage in terrorism support? I mean technically that may not be the agreement, but doesn't that work out to be the reality? If they stay in Qatar, is anyone really going to do anything to stop them? Would that not make it look like we are the ones who didn't honor the deal?