Aside from holy water, garlic, etc., what do the myths say? If werewolves can be killed with a silver bullet, with what material do you capture them alive? Do plain metal chains work? Or do they have to be made of certain materials?
The Slavs (from around the year 300) believed that vampires were afraid of silver (but couldn't be killed with it) and that one could kill them by cutting their head off and placing it between their legs, or by stabbing them with a wooden stake in the heart.
During the Middle Ages, the myth transformed a bit. People used holy water, wooden stake, and cross to kill a vampire (we can see the influence of the Christianity here). If people suspected that a dead person has turned into a vampire, they would dig them out and stick a stake into the heart.
This wasn't meant to kill the vampire but to bind it to the grave. Serbs believed that every single drop of blood had to be destroyed or else the vampire would still be "alive" (they were more or less living corpses, but you get my point) so they used to burn the vampire after that. Then butterflies would fly out of the vampire and people had to kill each one of them.
Garlic can only scare the vampire because of its strong and unpleasant smell. In order to stop the vampire's visits at night, people would hang garlic near every hole in the house (for example keyhole, chimney, windows..., because people believed that the vampire could enter the house even through the smallest hole).
One could also throw some seeds before the vampire, since they had to stop and count them all.
I'm not really sure how they used to capture them. I know vampires could be captured by stealing that cloth they had over them in the grave, but I have seen this only in vampire stories.
But in reality, people were just killing them and they were probably too scared to just capture them (that'd be pointless, wouldn't it). Although in Asia there were some kinds of vampires which people used to capture and then keep them in wooden cages and feed them eggs :P
I haven't heard of any captured werewolves either. If you want to investigate a bit, try reading some legends and old beliefs from the Balkans; I promise you'll find it very interesting!