You don't really give licences to individuals, you let individuals into your systems (it's a pedantic point, but it makes the following text a lot easier and shorter to write)
Atlassian systems allow people in via groups. These are set in the global administration area, and most people go with the defaults and have really simple schemes - members of the group jira-software-users can use Jira Software, members of jira-core-users can use Jira Core, members of confluence-users can use Confluence, and so-on. You can have more than one group that can log in (it's not unusual to see "can use Jira: Jira-users, region-1-people, region-2-people") and you can change the groups. Some people want a simple "can use atlassian stuff", so they will create a group atlassian-users and tell Jira, Confluence, Bitbucket etc that "atlassian-users is the can-log-in group"
So, the simple answer is yes. Look at the "can log in" group(s) you have set for Jira and Confluence and make sure the right people are in the right groups.
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