enomoto celtislab

You are using a tag cloud of the standard, and you do not want to display tags that belong to the category not related to the article. 
Try this widget. 
Based on the category of the display article, this widget gets the tag from the article categories of related range. 
For the article there is no category of post page, etc., or by setting <code>all category</code>, <code>internal link article</code>, it displays the tag by examining the related category. 
If you check the ‘internal link article’, get a category from the internal links to articles.
Select Category related range
<ul>
<li>All Category (unrelated article)</li>
<li>Current article Category</li>
<li>Include child category tree</li>
<li>Include parent category tree</li>
<li>Include internal linked article Category</li>
<li>Exclude Category</li>
</ul>
Other parameters : Display format, Sort by, Order, Font size, Number of tags to display, …
<a href="http://celtislab.net/wp_plugin_DCTagCloud/" title="Documentation in Japanese" rel="nofollow ugc">日本語の説明</a>

DynamicCategoryTagCloud

Displays the tag cloud dynamically from related articles belonging to the category of the display article

Muki Wu

Mesak Chuang

<ul>
<li>Another wordpress tag cloud plugin based on jQCloud plugin, which is creative, beauty and colorful.</li>
<li>If has any suggestion of design thought, please visit and leave comments in <a href="http://muki.tw/tech/wordpress-plugin-muki-tag-cloud/" rel="nofollow ugc">MUKI space*</a>, who is the authoer about plugin design, front-end, and creative;</li>
<li>
About plugin program discuss, you can visit to <a href="http://mesak.tw/code/php/3817/wordpress-plugin-muki-tag-cloud" rel="nofollow ugc">MesakTW</a>, who is the author about plugin development, and back-end.
</li>
<li>
可以在側邊欄或是支援小工具的位置加入這個標籤雲外掛。他跟一般標籤雲最大的差別是不規則的排列形狀，而且顏色豐富多彩，非常的有質感。
</li>
</ul>

Muki Tag Cloud

Another wordpress tag cloud plugin based on jQCloud, which is creative, beauty and colorful.

DynamicCategoryTagCloud vs Muki Tag Cloud